HMT TECHNOLOGY CORP
424B1, 1997-08-14
COMPUTER STORAGE DEVICES
Previous: THERMOQUEST CORP \DE\, 8-K, 1997-08-14
Next: INVISION TECHNOLOGIES INC, 10-Q, 1997-08-14



<PAGE>   1
                                               Filed Pursuant to Rule 424(b)(1) 
                                               Registration No. 333-32025

PROSPECTUS
 
10,000,000 SHARES
 
LOGO
 
COMMON STOCK
($.001 PAR VALUE)
 
Of the 10,000,000 shares (the "Shares") of Common Stock of HMT Technology
Corporation ("HMT" or the "Company") offered hereby, 1,000,000 are being sold by
the Company and 9,000,000 are being sold by certain stockholders of the Company
(the "Selling Stockholders"). See "Selling Stockholders." The Company will not
receive any of the proceeds from the sale of the Common Stock by the Selling
Stockholders.
 
Of the 10,000,000 Shares being offered hereby, 8,500,000 Shares are being
offered in the United States and Canada (the "U.S. Offering") and 1,500,000
Shares are being offered in a concurrent international offering outside the
United States and Canada (the "International Offering" and, together with the
U.S. Offering, the "Offerings"), subject to transfers between the U.S.
Underwriters and the International Underwriters (collectively, the
"Underwriters"). The Price to Public and Underwriting Discount per share will be
identical for the U.S. Offering and the International Offering. See
"Underwriting." The closing of the U.S. Offering and International Offering are
conditioned upon each other.
 
The Common Stock of the Company is traded on the Nasdaq National Market under
the symbol "HMTT." On
August 13, 1997, the last reported sales price for the Common Stock of the
Company as reported by the Nasdaq National Market was $14.94 per share. See
"Price Range of Common Stock."
 
SEE "RISK FACTORS" COMMENCING ON PAGE 6 FOR A DISCUSSION OF CERTAIN FACTORS
RELEVANT TO AN INVESTMENT IN THE COMMON STOCK OFFERED HEREBY.
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.
 
<TABLE>
<CAPTION>
- -----------------------------------------------------------------------------------------------------------
                                       PRICE TO        UNDERWRITING      PROCEEDS TO
                                        PUBLIC           DISCOUNT         COMPANY(1)        PROCEEDS TO
                                                                                              SELLING
                                                                                            STOCKHOLDERS
<S>                                <C>               <C>               <C>               <C>
Per Share......................... $14.50            $0.61             $13.89            $13.89
Total(2).......................... $145,000,000      $6,100,000        $13,890,000       $125,010,000
- -----------------------------------------------------------------------------------------------------------
</TABLE>
 
(1) Before deducting offering expenses payable by the Company estimated at
    $500,000.
 
(2) The Company and the Selling Stockholders have granted the U.S. Underwriters
    and the International Underwriters 30-day options to purchase up to
    1,275,000 and 225,000 additional Shares, respectively, solely to cover
    over-allotments, if any. If the Underwriters exercise these options in full,
    the total Price to Public, Underwriting Discount, Proceeds to Company and
    Proceeds to Selling Stockholders will be $166,750,000, $7,015,000,
    $15,973,500, and $143,761,500, respectively. See "Underwriting."
 
The Shares are offered subject to receipt and acceptance by the Underwriters, to
prior sale and to the Underwriters' right to reject any order in whole or in
part and to withdraw, cancel or modify the offer without notice. It is expected
that delivery of the Shares will be made at the office of Salomon Brothers Inc,
Seven World Trade Center, New York, New York, or through the facilities of The
Depository Trust Company, on or about August 19, 1997.
 
SALOMON BROTHERS INC
              ALEX. BROWN & SONS
                      INCORPORATED
 
                            HAMBRECHT & QUIST
 
                                        ROBERTSON, STEPHENS & COMPANY
 
The date of this Prospectus is August 13, 1997
<PAGE>   2
 
                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
 
     The following documents filed by the Company with the Securities and
Exchange Commission (the "Commission") (File No. 0-27586) pursuant to the
Securities Exchange Act of 1934, as amended (the "Exchange Act") are
incorporated herein by reference:
 
     1. The Company's Annual Report on Form 10-K (the "Company's Annual Report
        on Form 10-K"), for the fiscal year ended March 31, 1997.
 
     2. The Company's Quarterly Report on Form 10-Q, as amended by Form 10-Q/A,
        for the fiscal quarter ended June 30, 1997.
 
     3. The Company's Registration Statement on Form 8-A filed with the
        Commission on January 19, 1996.
 
     In addition, all reports and other documents subsequently filed by the
Company pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act after
the date of this Prospectus and prior to the termination of the offering shall
be deemed to be incorporated by reference herein and to be a part hereof from
the date of filing of such documents. Any statement contained in a document
incorporated by reference herein shall be deemed to be modified or superseded
for purposes of this Prospectus to the extent that a statement contained herein
or in any subsequently filed document that is also or is deemed to be
incorporated by reference herein modifies or supersedes such statement. Any such
statement so modified or superseded shall not be deemed, except as so modified
or superseded, to constitute a part of this Prospectus.
 
     The Company will provide without charge to each person, including any
beneficial owner, to whom this Prospectus is delivered, upon the written or oral
request of such person, a copy of any and all of the documents that are
incorporated herein by reference (other than exhibits to such documents, unless
such exhibits are specifically incorporated by reference into such documents).
Requests for such documents should be directed to HMT Technology Corporation,
Attn: Investor Relations, 1055 Page Avenue, Fremont, California 94538, telephone
number: (510) 683-6000.
 
     The HMT Technology logo is a trademark of the Company.
                            ------------------------
 
     CERTAIN PERSONS PARTICIPATING IN THIS OFFERING MAY ENGAGE IN TRANSACTIONS
THAT STABILIZE, MAINTAIN OR OTHERWISE AFFECT THE PRICE OF THE COMMON STOCK
INCLUDING BY ENTERING STABILIZING BIDS OR EFFECTING SYNDICATE COVERING
TRANSACTIONS. FOR A DESCRIPTION OF THESE ACTIVITIES, SEE "UNDERWRITING."
                            ------------------------
 
     IN CONNECTION WITH THIS OFFERING, CERTAIN UNDERWRITERS AND SELLING GROUP
MEMBERS (IF ANY) OR THEIR RESPECTIVE AFFILIATES MAY ENGAGE IN PASSIVE MARKET
MAKING TRANSACTIONS IN THE COMMON STOCK ON THE NASDAQ NATIONAL MARKET IN
ACCORDANCE WITH RULE 103 OF REGULATION M. SEE "UNDERWRITING."
 
                                        2
<PAGE>   3
 
                               PROSPECTUS SUMMARY
 
     The following summary is qualified in its entirety by the more detailed
information and financial data, including "Risk Factors," appearing elsewhere in
this Prospectus, and in the documents incorporated herein by reference. This
Prospectus contains forward-looking statements which involve risks and
uncertainties. The Company's actual results may differ significantly from the
results discussed in the forward-looking statements. Factors that might cause
such a difference include, but are not limited to, those discussed in "Risk
Factors." The definition of certain terms may be found in the Glossary on page
34.
 
                                  THE COMPANY
 
     HMT is an independent supplier of high-performance thin film disks for
high-end, high-capacity hard disk drives, which in turn are used in high-end
personal computers ("PCs"), network servers and workstations. The disks
currently being shipped by the Company are primarily for disk drives with
storage capacities ranging from 2.0 to 10.0 gigabytes (using two to 12 disks),
and substantially all have coercivity levels of 2000 Oe or higher. The Company
also supplies high-performance thin film disks for removable hard disk drives.
Since March 1994, the Company has focused on addressing the needs of the
high-end, high-capacity segment of the disk drive market. HMT believes that its
recent operating results reflect its success in meeting these needs and that its
future growth and success depend on its ability to continue to develop and
market products that enable its customers to produce high-performance disk
drives for high-end data storage applications. The Company provides a range of
magnetic density points (coercivities), glide heights and disk thicknesses to
meet the design and performance requirements of each particular customer. The
Company's principal customers currently include Maxtor Corporation ("Maxtor"),
Samsung Electronics Company Limited ("Samsung"), Iomega Corporation ("Iomega"),
Western Digital Corporation ("Western Digital"), Micropolis Corporation
("Micropolis") and Quantum Corporation ("Quantum").
 
     Market demand for disks and disk drives has been growing steadily,
stimulated by demand for new computers, upgrades to existing computers and the
growing use of sophisticated network servers. The combined demand from the PC
and server markets has resulted in strong growth in unit shipments of disk
drives, which in turn has stimulated the growth of the thin film disk market.
According to Trend Focus, there were 340 million thin film disks produced in
1996, with an estimated market value of $4.0 billion. Trend Focus projects that
the total market for thin film disks will reach 725 million units in 2000, with
an estimated market value of $7.9 billion.
 
     The most significant technological challenges facing disk manufacturers
today are associated with market demand for increased storage capacity and
durability. An effective implementation of thin film technology to meet these
challenges must address various performance-related characteristics, including
magnetics, glide height, durability and stiction. HMT focuses on providing
value-added technological solutions that meet the demands of the high-end,
high-capacity disk drive market. The Company develops, manufactures and sells
technologically advanced products designed to provide improved performance,
principally through achieving higher coercivities and lower glide heights. The
Company seeks to be a supplier to disk drive manufacturers with a proven record
for technological leadership because these customers have the greatest ability
to fully exploit the value of technologically superior disks.
 
     HMT believes that its internally developed proprietary and patented
manufacturing processes and state-of-the-art equipment, to which it has made
proprietary modifications, combined with its extensive expertise, currently
provide HMT with a technological advantage over competing independent thin film
disk manufacturers. Particularly important to the Company's success are its
unique tribology approach, its commitment to developing disks for drives
utilizing new head technology and its ability to produce high-coercivity disks
using non-precious metal alloys.
 
                                        3
<PAGE>   4
 
     The key elements of HMT's strategy are as follows: establish and maintain
leadership in high-end product technology; develop collaborative relationships
with leading head manufacturers and disk drive manufacturers; develop advanced
manufacturing processes to support volume production; expand manufacturing
capacity; and maintain strict quality control of manufacturing processes.
 
     The Company recently completed construction of a 124,000 square foot
production facility at its Fremont, California site, in which it had brought
into service six production scale sputtering lines by the end of the first
quarter of fiscal 1998. The Company plans to install up to 10 additional
sputtering lines in this facility. In addition, the Company completed an
expansion of its facility in Eugene, Oregon during fiscal 1997, where it
produces aluminum substrates and nickel-plated and polished substrates.
 
     HMT was incorporated in Delaware in 1988. The Company's principal executive
offices are located at 1055 Page Avenue, Fremont, California 94538; telephone
number: (510) 683-6000.
 
                                 THE OFFERINGS
 
<TABLE>
<S>                                         <C>
Common Stock offered by the Company
  U.S. Offering...........................  850,000 shares
  International Offering..................  150,000 shares
          Total...........................  1,000,000 shares
Common Stock offered by the Selling
  Stockholders
  U.S. Offering...........................  7,650,000 shares
  International Offering..................  1,350,000 shares
          Total...........................  9,000,000 shares
Common Stock to be outstanding
  after the Offerings.....................  42,334,565 shares(1)
Use of Proceeds...........................  Capital expenditures, working capital and other
                                            general corporate purposes. The Company will not
                                            receive any proceeds from the sale of shares of
                                            Common Stock in the Offerings by the Selling
                                            Stockholders. See "Use of Proceeds."
Nasdaq National Market symbol.............  HMTT
</TABLE>
 
- ---------------
 
(1) Based on shares outstanding as of August 13, 1997. Excludes as of such date
    4,023,143 shares of Common Stock issuable upon exercise of outstanding stock
    options at a weighted average exercise price of $5.61 per share and 210,397
    shares issuable upon exercise of an outstanding warrant at an exercise price
    of $0.0003 per share.
 
                                        4
<PAGE>   5
 
                      SUMMARY CONSOLIDATED FINANCIAL DATA
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)
 
<TABLE>
<CAPTION>
                                                                                                       THREE MONTHS ENDED
                                                          YEAR ENDED MARCH 31,                              JUNE 30,
                                      ------------------------------------------------------------     -------------------
                                        1993         1994         1995         1996         1997        1996        1997
                                      --------     --------     --------     --------     --------     -------     -------
                                                                                                           (UNAUDITED)
<S>                                   <C>          <C>          <C>          <C>          <C>          <C>         <C>
STATEMENT OF OPERATIONS DATA:
Net sales...........................  $ 70,987     $ 64,242     $ 72,893     $194,401     $263,209     $76,420     $76,837
Gross profit (loss).................    (5,250)      (3,406)       5,354       74,598      106,932      32,406      29,361
Operating income (loss).............   (12,474)     (11,302)      (2,006)      58,674       89,317      28,110      23,641
Net income (loss) available for
  common stockholders...............  $(17,056)    $(17,325)    $ (8,941)    $ 45,222     $ 61,745     $15,895     $15,369
Net income (loss) available for
  common stockholders per share(1)..  $  (0.49)    $  (0.50)    $  (0.26)    $   1.28     $   1.35     $  0.36     $  0.31
Shares used in computing per share
  amounts(1)........................    34,822       34,822       34,822       35,224       46,027      44,015      53,805
</TABLE>
 
<TABLE>
<CAPTION>
                                                                           JUNE 30, 1997
                                                                     -------------------------
                                                                      ACTUAL    AS ADJUSTED(2)
                                                                     --------   --------------
                                                                     (UNAUDITED)
<S>                                                                  <C>        <C>
BALANCE SHEET DATA:
Working capital....................................................  $ 61,513      $ 74,903
Total assets.......................................................  $406,252      $419,642
Total liabilities..................................................  $294,392      $294,392
Total stockholders' equity.........................................  $111,860      $125,250
</TABLE>
 
- ---------------
 
(1) See Note 1 of Notes to the Consolidated Financial Statements included in the
    Company's Annual Report on Form 10-K and incorporated by reference into this
    Prospectus for an explanation of the determination of the number of fully
    diluted shares used in computing net income (loss) per share.
 
(2) Adjusted to reflect the sale of the Shares in the Offerings at the public
    offering price of $14.50 per share, after deducting underwriting discounts
    and commissions and the offering expenses payable by the Company, and the
    application of the net proceeds therefrom. See "Use of Proceeds."
 
     Unless otherwise indicated, all information contained in this Prospectus
assumes no exercise of the Underwriters' over-allotment option. See
"Underwriting." The Company operates under thirteen-to-fourteen-week quarters
that end on the Sunday closest to calendar quarter end. As a result, a fiscal
quarter may not end on the same day as the calendar quarter end. For convenience
of presentation, financial information has been shown as ending on the last day
of the calendar quarter.
 
                                        5
<PAGE>   6
 
                                  RISK FACTORS
 
     In addition to the other information in this Prospectus, the following risk
factors should be considered carefully in evaluating the Company and its
business. This Prospectus contains forward-looking statements which involve
risks and uncertainties. The Company's actual results may differ significantly
from the results discussed in the forward-looking statements. Factors that might
cause such a difference include, but are not limited to, those discussed below.
 
FLUCTUATIONS IN OPERATING RESULTS
 
     The Company's operating results historically have been, and may continue to
be, subject to significant quarterly and annual fluctuations. As a result, the
Company's operating results in any quarter may not be indicative of its future
performance. Factors affecting operating results include but are not limited to:
market acceptance of new products; timing of significant orders; changes in
pricing by the Company or its competitors; timing of product announcements and
product transitions by the Company, its customers or its competitors; order
cancellations, modifications and quantity adjustments and shipment
reschedulings; changes in product mix; manufacturing yields; the level of
utilization of the Company's production capacity; increases in production and
engineering costs associated with initial manufacture of new products; and
changes in the cost of or limitations on the availability of materials. The
impact of these and other factors on the Company's revenues and operating
results in any future period cannot be forecasted with certainty. The Company's
expense levels are based, in part, on its expectations as to future revenues.
Because the Company's sales are generally made pursuant to purchase orders that
are subject to cancellation, modification, quantity reduction or rescheduling on
short notice and without significant penalties, the Company's backlog as of any
particular date may not be indicative of sales for any future period, and such
changes could cause the Company's net sales to fall below expected levels. If
revenue levels are below expectations, operating results are likely to be
materially adversely affected. Net income, if any, and gross margins may be
disproportionately affected by a reduction in net sales because a
proportionately smaller amount of the Company's expenses varies with its
revenues. See "-- Dependence on Suppliers" and "Management's Discussion and
Analysis of Financial Condition and Results of Operations."
 
     The Company derives substantially all of its net sales from the sale of
thin film disks to a small number of customers. The Company typically supplies
disks in volume for a limited number of disk drive products (11, as of June 30,
1997) at any one time, and these products have an extremely short life cycle.
Due to the rapid technological change and frequent development of new disk drive
products, it is common in the industry for the relative mix of customers and
products to change rapidly, even from quarter to quarter. Generally, new
products have higher average selling prices than more mature products.
Therefore, the Company's ability to introduce new products in a timely fashion
is an important factor in its continued success. Manufacturing yields and
production capacity utilization may impact the Company's operating results. New
products often have lower manufacturing yields and are produced in lower
quantities than more mature products. If production for a disproportionate
number of new products is commenced in a given quarter or if manufacturing
yields for such products do not improve in a timely manner, the Company's
operating results for such quarter could be adversely affected. For example,
during the quarter ended March 31, 1997, the Company's operating results were
adversely affected due partly to lower yields associated with initial production
of a significant number of new products. Manufacturing yields generally improve
as the product matures and production volumes increase. Manufacturing yields
also vary depending on the complexity and uniqueness of product specifications.
The ability to adjust manufacturing procedures to reduce costs and improve
manufacturing yields and productivity during a product's life is limited, and
many adjustments can only be implemented in connection with new product
introductions or upgrades. Small variations in manufacturing yields and
productivity can have a significant impact on operating results. Furthermore,
because the thin film disk industry is capital intensive and requires a high
level of fixed costs, operating results are also extremely sensitive to changes
in volume. Substantial advance planning and commitment of financial and other
resources is necessary for expansion of manufacturing capacity, while the
Company's sales are generally
 
                                        6
<PAGE>   7
 
made pursuant to purchase orders that are subject to cancellation, modification,
quantity reduction or rescheduling without significant penalties. The impact of
any of the foregoing factors could have a material adverse effect on the
Company's business, operating results and financial condition.
 
DEPENDENCE ON A LIMITED NUMBER OF CUSTOMERS; LENGTHY SALES CYCLE
 
     During fiscal 1997, the Company shipped most of its thin film disks to four
customers: Maxtor, Samsung, Iomega and Western Digital. Aggregate shipments to
Maxtor, Samsung, Iomega and Western Digital represented 40.7%, 19.8% 12.2% and
11.9%, respectively, of net sales in fiscal 1997, and 9.7%, 27.7%, 32.1%, and
18.7%, respectively, of net sales in the first quarter of fiscal 1998. There are
a relatively small number of disk drive manufacturers, and the Company expects
that its dependence on a few customers will continue in the future. Loss of, or
a reduction in orders from, one or more of the Company's customers could result
in a substantial reduction in net sales and operating results. Because many of
the Company's expense levels are based, in part, on its expectations as to
future revenues, decreases in net sales may result in a disproportionately
greater negative impact on operating results. The Company's success will
therefore depend on the success of its key customers. One or more of the
Company's customers could develop or expand their ability to produce thin film
disks internally and, as a result, could reduce the level of purchases or cease
purchasing from the Company or could sell thin film disks in competition with
the Company. For example, one of the Company's customers, Western Digital,
manufactures thin film disks for its own use and an affiliate of another
customer, Maxtor, recently began to do so. There has also been a trend toward
consolidation in the disk drive industry, which the Company expects to continue.
For example, in February 1996, two leading disk drive manufacturers, Seagate
Technology, Inc. ("Seagate") and Conner Peripherals, Inc., combined to form the
world's largest disk drive manufacturing company. In addition, during the second
calendar quarter of 1996, Hewlett-Packard announced its intentions to exit the
disk drive business. If any of the Company's customers or competitors were to
combine and reduce suppliers and competitive product lines, the Company's
business, operating results and financial condition could be materially
adversely affected. See "Business -- Customers, Sales and Support."
 
     The Company has generally sold its products to customers pursuant to
purchase orders and similar short-term arrangements. In June 1996, the Company
entered into a long-term supply agreement with Maxtor covering the supply of
disks to Maxtor through June 2001. While this agreement contemplates significant
purchases of disks by Maxtor, it is subject to a number of conditions and
qualifications and there can be no assurance that Maxtor will in fact remain a
significant customer during the term of the agreement.
 
     Qualifying thin film disks for incorporation into a new disk drive product
requires the Company to work extensively with the customer and the customer's
other suppliers to meet product specifications. Therefore, customers often
require a significant number of product presentations and demonstrations, as
well as substantial interaction with the Company's senior management, before
making a purchasing decision. Accordingly, the Company's products typically have
a lengthy sales cycle, which can range from six to 12 months, during which the
Company may expend substantial financial resources and management time and
effort with no assurance that a sale will result.
 
EXPANSION OF CAPACITY
 
     Because the Company has been operating at close to full capacity, growth,
if any, in the Company's net sales depends on the successful expansion by the
Company of its manufacturing capacity. The Company recently completed
construction of a new 124,000 square foot production facility at its Fremont,
California site. The administrative office areas and six production scale
sputtering lines were brought into service by the end of the first quarter of
fiscal 1998. The Company plans to install up to 10 additional production scale
sputtering lines in this new facility. In addition, the Company completed an
expansion of its facility in Eugene, Oregon during fiscal 1997, where it
produces aluminum substrates and nickel-plated and polished substrates. The
Company currently expects to spend in excess of $200 million over the next
twelve months for expansion of production capacity, a substantial majority of
 
                                        7
<PAGE>   8
 
which will be spent on the Company's Fremont, California facility. Any delay in
the completion of any of these expansion programs could have a material adverse
effect on the Company's business, results of operations and financial condition.
 
INTENSE COMPETITION
 
     The market for the Company's products is highly competitive, and the
Company expects competition to continue in the future. Certain of the Company's
competitors have significantly greater financial, technical and marketing
resources than the Company. There can be no assurance that in the future the
Company will be able to develop and manufacture products on a timely basis with
the quality and features necessary in order to remain competitive. Competitors
in the thin film disk industry fall into three groups: U.S. non-captive
manufacturers, Japan-based manufacturers and U.S. captive manufacturers.
Historically, each of these groups has supplied approximately one-third of the
worldwide thin film disk unit output. The Company's primary U.S. non-captive
competitors are Akashic Memories Corporation, a subsidiary of Kubota, Inc.
("Akashic"), Komag, Incorporated ("Komag") and StorMedia Incorporated
("StorMedia"). Japan-based competitors include Fuji Electric Company Limited
("Fuji"), Mitsubishi Kasei Corporation ("Mitsubishi"), Showa Denko K.K. ("Showa
Denko") and Hoya Corporation ("Hoya"). In addition, U.S. captive manufacturers,
which include certain computer manufacturers, as well as disk drive
manufacturers such as Seagate, Western Digital and an affiliate of Maxtor,
manufacture disks or plan to manufacture disks for their internal use as part of
their vertical integration programs. These companies could increase their
internal production and reduce or cease purchasing from independent disk
suppliers such as the Company. In the event of an oversupply of disks, these
customers are likely to utilize their internal capacity prior to purchasing
disks from independent suppliers such as the Company. Moreover, while captive
manufacturers have, to date, sold only nominal quantities of thin film disks in
the open market, there can be no assurance that such companies will not in the
future do so in direct competition with the Company. Furthermore, there can be
no assurance that other current and potential customers will not acquire or
develop capacity to produce thin film disks for internal use or that disk
manufacturing capacity will not exceed demand. Any such changes could have a
material adverse effect on the Company's business, operating results and
financial condition.
 
     Announcement or implementation of any of the following by the Company's
competitors could have a material adverse effect on the Company's business,
operating results and financial condition: changes in pricing, product
introductions, increases in production capacity, changes in product mix and
technological innovation. The thin film disk industry is characterized by
intense price competition. The Company has experienced pricing pressures in the
past, and there can be no assurance that the Company will not experience
increased price competition in the future. Pricing pressure has included, and
may in the future include, demands for discounts, long-term supply commitments
and extended payment terms. Any increase in price competition could have a
material adverse effect on the Company's business, operating results and
financial condition. The Company and certain of its competitors are currently
engaged in substantial efforts to increase disk manufacturing capacity. To the
extent that these efforts result in industry capacity in excess of levels of
demand, the Company could experience increased levels of competition, which
could have a material adverse effect on the Company's business, operating
results and financial condition. See "Business -- Competition."
 
MANAGEMENT OF GROWTH
 
     The Company has experienced a period of rapid expansion in its operations,
including the organization and management of a significant expansion in
manufacturing capacity that has placed, and may continue to place, a significant
strain on the Company's management and other resources. The Company's status as
a public company since its March 1996 initial public offering has placed
additional demands on the Company's management, including its finance and
accounting organization and information systems. The Company currently plans to
install a new enterprise-wide integrated financial, accounting and manufacturing
information system beginning in the third quarter of fiscal 1998. There can be
no assurance that the Company will be able to complete this implementation
without disruption to its
 
                                        8
<PAGE>   9
 
business, that such efforts will be achieved at acceptable expense levels or
that such efforts will not distract the attention of management of the Company.
The Company's ability to manage its operations effectively will require it to
continue to improve its operational, financial and management information
systems, and to train, motivate and manage its employees. If the Company's
management is unable to manage its operations effectively, the Company's
business, operating results and financial condition could be adversely affected.
 
DEPENDENCE ON INTENSELY COMPETITIVE AND CYCLICAL HARD DISK DRIVE INDUSTRY
 
     The Company's operating results are primarily dependent on current and
anticipated demand for high-end, high-capacity hard disk drives, which in turn
depend on the demand for high-end PCs, network servers and workstations. The
disk drive industry is cyclical and historically has experienced periods of
oversupply and reduced production levels, resulting in significantly reduced
demand for thin film disks, as well as pricing pressures. The effect of these
cycles on suppliers, including thin film disk manufacturers, has been magnified
by hard disk drive manufacturers' practice of ordering components, including
thin film disks, in excess of their needs during periods of rapid growth, which
increases the severity of the drop in the demand for components during periods
of reduced growth or contraction. In recent years, the disk drive industry has
experienced significant growth, providing the Company with the opportunity to
expand its capacity. There can be no assurance that such growth will continue,
that the level of demand will not decline, or that future demand will be
sufficient to support existing and future capacity. A decline in demand for hard
disk drives would have a material adverse effect on the Company's business,
operating results and financial condition. See "Management's Discussion and
Analysis of Financial Condition and Results of Operations." Additionally, the
hard disk drive industry is intensely competitive, and, in the past, some disk
drive manufacturers have experienced substantial financial difficulties. To
date, the Company has not incurred significant bad debt expense. However, there
can be no assurance that the Company will not face greater difficulty in
collecting receivables or be required to offer more liberal payment terms in the
future, particularly in a period of reduced demand. Any failure to collect or
delay in collecting receivables could have a material adverse effect on the
Company's business, operating results and financial condition. See
"Business -- Customers, Sales and Support."
 
RAPID TECHNOLOGICAL CHANGE
 
     The thin film disk industry has been characterized by rapid technological
development and short product life cycles. Product life cycles typically range
from nine to twelve months. As a result, the Company must continually
anticipate, and adapt its products to meet, demand for increased storage
capacity. Although the Company is continually developing new products and
production techniques, there can be no assurance that the Company will be able
to anticipate technological advances in disk drives and develop products
incorporating such advances in a timely manner or to compete effectively against
its competitors' new products. In addition, there can be no assurance that
customers will certify the Company's products for inclusion in new disk drive
products. The Company anticipates continued changes in the requirements of the
disk drive industry and thin film disk manufacturing technologies, and there can
be no assurance that the future technological innovations will not reduce demand
for thin film disks. The Company's business, operating results and financial
condition will be materially adversely affected if the Company's efforts are not
successful, if the technologies that the Company has chosen not to develop prove
to be competitive alternatives or if any trend develops toward technology that
would replace thin film disks as a storage medium. See "Business -- Industry
Background -- Challenges Facing the Disk Drive Industry" and "-- Products."
 
DEPENDENCE ON SUPPLIERS
 
     The Company relies on a limited number of suppliers for many materials used
in its manufacturing processes, including aluminum blanks, substrates,
texturizers, plating chemicals, abrasive tapes and slurries, certifier heads,
sputter targets and certain other materials. In general, the Company seeks to
have two or three suppliers for its requirements; however, there can be no
assurance that the Company
 
                                        9
<PAGE>   10
 
can secure more than one source for all of its materials requirements in the
future or that its suppliers will be able to meet the Company's requirements on
a timely basis or on acceptable terms. Shortages have occurred in the past and
there can be no assurance that shortages will not occur in the future, or that
materials will be available without longer lead times. Moreover, changing
suppliers for certain materials, such as lube or buffing tape, would require
that the product be requalified with each customer. Requalification could
prevent an early design-in, or could prevent or delay continued participation in
disk drive programs for which the Company's products have been qualified. In
addition, long lead times are required to obtain many materials. Regardless of
whether these materials are available from established or new sources of supply,
these lead times could impede the Company's ability to quickly respond to
changes in demand and product requirements. Furthermore, a significant increase
in the price of one or more of these materials could adversely affect the
Company's business, operating results and financial condition. In addition,
there are only a limited number of providers for thin film disk manufacturing
equipment, such as sputtering machines, glide testers and certifiers, and
ordering additional equipment for replacement or expansion requires long lead
times, limiting the rate and flexibility of capacity expansion. Any limitations
on, or delays in, the supply of materials or equipment could disrupt the
Company's production volume and could have a material adverse effect on the
Company's business, operating results and financial condition.
 
PROCESS QUALITY CONTROL RISKS
 
     The manufacture of the Company's high-performance thin film disks requires
a tightly controlled multi-stage process and the use of high-quality materials.
Efficient production of the Company's products requires utilization of advanced
manufacturing techniques and clean room facilities. Disk fabrication occurs in a
highly controlled, clean environment to minimize dust and other yield- and
quality-limiting contaminants. Despite stringent manufacturing controls,
weaknesses in process control or minute impurities in materials may cause a
substantial percentage of the disks in a lot to be defective. The success of the
Company's manufacturing operation depends in part on the Company's ability to
maintain process control and minimize such impurities in order to maximize its
yield of acceptable high-quality disks. Minor variations from the Company's
specifications could have a disproportionate effect on manufacturing yields. For
example, in the quarter ended March 31, 1995, the Company's operating results
were materially adversely affected by chlorine contamination of its thin film
disk products that it believes resulted from chlorine contamination of disk
carriers provided by one of its suppliers. While the Company has implemented
procedures to monitor its manufacturing process and the quality of production
materials, there can be no assurance that such procedures will be adequate. See
"Business -- Manufacturing and Quality -- Quality Assurance."
 
NEED FOR ADDITIONAL FINANCING
 
     The disk media business is capital intensive, and the Company believes that
in order to remain competitive, it may need significant additional financing
over the next several years for capital expenditures, working capital, and
research and development. Among other things, the Company's customers prefer
suppliers that can meet a substantial portion of their volume requirements, so
the Company will need to expand its manufacturing capacity to remain
competitive. The Company currently expects to spend in excess of $200 million on
capital expenditures directed toward expansion of production capacity over the
next twelve months. The Company believes existing cash balances, cash generated
from operations, and funds available under its credit facility will provide
adequate cash to fund its operations for at least the next twelve months. While
operating activities are expected to provide cash in certain periods, continued
expansion of the Company's manufacturing capacity may require the Company to
obtain additional sources of financing. Additional sources of long-term
liquidity could include cash generated from operations and debt and equity
financings. The Company continues to have significant future obligations and
expects that it may require additional capital to support continued expansion of
the Company's manufacturing capacity and growth, if any. There can be no
assurance that the Company will be able to obtain alternative sources of
financing on favorable terms, if at all, at such time or times as the Company
may require such capital. See "Use of Proceeds," "Capitalization" and
"Management's
 
                                       10
<PAGE>   11
 
Discussion and Analysis of Financial Condition and Results of
Operations -- Liquidity and Capital Resources."
 
INTELLECTUAL PROPERTY AND PROPRIETARY RIGHTS
 
     Although the Company attempts to protect its intellectual property rights
through patents, copyrights, trade secrets and other measures, there can be no
assurance that the Company will be able to protect its technology adequately or
that competitors will not be able to develop similar technology independently.
The Company has 34 patents and 18 pending patent applications in the United
States. In addition, the Company has nine foreign patents. Patents may not be
issued with respect to the Company's pending patent applications, and its issued
patents may not be sufficiently broad to protect the Company's technology. No
assurance can be given that any patent issued to the Company will not be
challenged, invalidated or circumvented or that the rights granted thereunder
will provide adequate protection to the Company's products. In addition, the
Company has only limited patent rights outside the United States, and the laws
of certain foreign countries may not protect the Company's intellectual property
rights to the same extent as do the laws of the United States.
 
     The Company is from time to time notified by third parties that it may be
infringing patents owned by such third parties. If necessary, the Company may
have to seek a license under such patents or modify its products and processes
in order to avoid infringement of such patents. There can be no assurance that
such a license would be available on acceptable terms, if at all, or that the
Company could so avoid infringement of such patents, in which case the Company's
business, operating results and financial condition could be materially
adversely affected.
 
     On December 16, 1996 and July 1, 1997, Virgle L. Hedgcoth filed complaints
against the Company and several other entities in the Federal District Court for
the Northern District of California. In each complaint, Mr. Hedgcoth alleges
that certain HMT disks infringe patents allegedly owned by him. Each complaint
seeks an injunction and unspecified damages, which are sought to be trebled.
With respect to the December 16, 1996 complaint, the Company has filed a
counterclaim seeking a declaratory judgment that such patents are invalid and
unenforceable and that they are not infringed by the HMT disks. The Company
intends to defend both cases vigorously and does not believe that the litigation
Mr. Hedgcoth has pursued will have a material adverse effect on the Company's
business, operating results or financial condition.
 
     Litigation may be necessary to enforce the Company's patents, copyrights or
other intellectual property rights, to protect the Company's trade secrets, to
determine the validity and scope of the proprietary rights of others, or to
defend against claims of infringement or claims for indemnification resulting
from infringement claims by third parties. Such litigation, even if successful,
could result in substantial costs and diversion of resources and could have a
material adverse effect on the Company's business, operating results and
financial condition.
 
DEPENDENCE ON KEY PERSONNEL
 
     The Company's future operating results depend in significant part upon the
continued contributions of its officers and personnel, many of whom would be
difficult to replace. The Company does not have employment agreements with any
employee. The loss of its officers or other key personnel, who are critical to
the Company's success, could have a material adverse effect on the business,
operating results and financial condition of the Company. In addition, the
Company's future operating results depend in part upon its ability to attract,
train, retain and motivate other qualified management, technical, manufacturing,
sales and support personnel for its operations. Competition for such personnel
is intense, especially since many of the Company's competitors are located near
the Company's facilities in Fremont, California. Among the competitive factors
in attracting personnel are compensation and benefits, equity incentives and
geographic location. There can be no assurance that the Company will be
successful in attracting or retaining such personnel. The loss of the services
of existing personnel as well
 
                                       11
<PAGE>   12
 
as the failure to recruit additional personnel could materially adversely effect
the Company's business, operating results and financial condition.
 
DEPENDENCE ON FREMONT MANUFACTURING FACILITIES; ENVIRONMENTAL ISSUES
 
     The Company's Fremont facilities, which currently account for all of its
finished products, are located near major earthquake faults. Disruption of
operations for any reason, including power failures, work stoppages or natural
disasters such as fire, floods or earthquakes, would cause delays in, or an
interruption of, production and shipment of products, which could materially
adversely affect the Company's business, operating results and financial
condition. See "Business -- Manufacturing and Quality -- Manufacturing
Facilities and Capacity."
 
     The Company's operations and manufacturing processes are subject to certain
environmental laws and regulations, which govern the Company's use, handling,
storage, transportation, disposal, emission and discharge of hazardous materials
and wastes, the pre-treatment and discharge of process waste waters and its
emission of air pollutants. The Company has from time to time been notified of
minor violations of environmental laws and regulations. These violations have
been corrected in all material respects without undue expense. Additionally,
existing waste water treatment facilities and air emission control devices are
being upgraded to accommodate increased production and more restrictive
environmental discharge levels. Environmental laws and regulations, however, may
become more stringent over time, and there can be no assurance that the
Company's failure to comply with either present or future laws or regulations,
which may become more stringent, would not subject the Company to significant
compliance expenses, production suspension or delay, restrictions on expansion
or the acquisition of costly equipment.
 
RISKS OF INTERNATIONAL SALES
 
     In fiscal 1996 and 1997, substantially all of the Company's net sales
consisted of products delivered to customers in Asia, primarily foreign
subsidiaries of U.S. companies, and the Company anticipates that the substantial
majority of its products will be delivered to customers outside of the United
States for the foreseeable future. Accordingly, the Company's operating results
are subject to the risks of doing business in foreign jurisdictions, including
compliance with, or changes in, the law and regulatory requirements of foreign
jurisdictions, local content rules, taxes, tariffs or other barriers, and
transportation delays and other interruptions. Although presently all of the
Company's sales are made in U.S. dollars, there can be no assurance that future
international sales will not be denominated in foreign currency.
 
SHARES ELIGIBLE FOR FUTURE SALE; REGISTRATION RIGHTS
 
     Sales of substantial amounts of the Company's Common Stock in the public
market could adversely affect the market price of the Company's Common Stock and
the Company's ability to raise additional capital at a price favorable to the
Company. Based on beneficial ownership of Common Stock as set forth under
"Selling Stockholders," executive officers, directors and certain stockholders
holding an aggregate of 26,579,533 shares of Common Stock have entered into
lockup agreements with the Underwriters (the "Lockup Agreements") pursuant to
which shares may not be offered, sold or otherwise disposed of, with certain
limited exceptions, without the prior written consent of Salomon Brothers Inc
for a period of 90 days after the date of this Prospectus (ending November 11,
1997). Upon expiration of the Lockup Agreements, 26,279,533 of such shares will
be available for sale pursuant to Rule 144 adopted under the Securities Act,
subject to the volume limitations under Rule 144, so long as the holders of such
shares continue to be affiliates of the Company. Upon the expiration of the
Lockup Agreements, the remaining approximately 300,000 shares covered by the
Lockup Agreements will be available for sale, subject to certain volume
limitations under Rule 144. Such shares will no longer be "restricted shares"
under Rule 144 upon the expiration of a two-year period from the date such
shares were acquired (November 30, 1995). The holders of the 25,419,380 shares
also have the right to require the Company to register such shares for sale to
the public under agreements with the Company. See "Description of Capital
Stock -- Registration Rights."
 
                                       12
<PAGE>   13
 
     The Company has registered under the Securities Act an aggregate of
7,312,029 shares of Common Stock reserved for issuance under the Company's 1995
Management Stock Option Plan, the 1995 Stock Option Plan, the 1996 Equity
Incentive Plan, the 1996 Non-Employee Directors' Stock Option Plan and the
Employee Stock Purchase Plan (collectively, the "Stock Plans"), thus permitting
the sale of such shares by non-affiliates in the public market without
restriction under the Securities Act. The shares registered include shares
issuable upon exercise of options to purchase 13,760,595 shares that were issued
and outstanding at June 30, 1997, of which options to purchase approximately
6,549,718 shares were exercisable and immediately saleable. The remainder of
these shares will become exercisable and saleable at various dates through
December 1999 pursuant to monthly vesting.
 
CONTROL BY EXISTING STOCKHOLDERS AND ANTI-TAKEOVER EFFECTS
 
     Based on shares outstanding at June 30, 1997 (after giving effect to the
Offerings), directors, officers and holders of 5% or more of the outstanding
shares of Common Stock of the Company owned approximately 41% of the outstanding
shares of Common Stock (31% assuming conversion of the Company's 5 3/4%
Convertible Subordinated Notes due 2004 and exercise of all outstanding options
and warrants to purchase Common Stock). As a result, the directors, officers and
holders of 5% or more of the outstanding shares of the Company's Common Stock,
acting together, will have the ability to significantly influence the election
of the Company's directors and to influence most corporate actions. Certain
provisions of the Company's Amended and Restated Certificate of Incorporation,
Bylaws and Delaware law, including the provisions of Section 203 of the Delaware
General Corporation Law, which restrict the ability of a substantial stockholder
to acquire the Company, may also discourage certain transactions involving a
change in control of the Company. In addition to the foregoing, the ability of
the Board of Directors to issue "blank check" preferred stock without further
stockholder approval could have the effect of delaying, deferring or preventing
a change in control of the Company. See "Selling Stockholders" and "Description
of Capital Stock."
 
VOLATILITY OF COMMON STOCK PRICES
 
     The trading price of the Company's Common Stock could be subject to wide
fluctuations in response to a variety of factors, including quarterly variations
in operating results, announcements of technological innovations or new products
by the Company, its customers or its competitors, developments in patents or
other intellectual property rights, general conditions in the computer or disk
drive industry, and general economic and market conditions. Additionally, the
stock market in general, and the market for technology stocks in particular, has
experienced extreme price volatility in recent years. This volatility has often
had a substantial effect on the market prices of many technology companies for
reasons unrelated or disproportionate to the operating performance of such
companies. Broad market fluctuations could have a significant impact on the
market price of the Common Stock.
 
                                       13
<PAGE>   14
 
                                USE OF PROCEEDS
 
     The net proceeds to the Company from the sale of the 1,000,000 shares of
Common Stock by the Company in the Offerings are estimated to be approximately
$13.4 million (approximately $15.5 million if the Underwriters' over-allotment
options are exercised in full), based upon the public offering price of $14.50
per share and after deducting estimated underwriting discounts and commissions
and offering expenses. The Company will not receive any of the proceeds from the
sale of the shares of Common Stock offered by the Selling Stockholders. The
Company expects to use the net proceeds of this offering for capital
expenditures, working capital and other general corporate purposes. Pending such
uses, the Company intends to invest the net proceeds from these Offerings in
interest-bearing investment grade securities.
 
                                DIVIDEND POLICY
 
     The Company has never declared or paid cash dividends on its Common Stock.
The Company currently intends to retain all future earnings for use in its
business and does not anticipate paying cash dividends on the Common Stock in
the foreseeable future. In addition, the terms of the Company's revolving credit
facility prohibit the payment of dividends without the banks' prior approval.
 
                          PRICE RANGE OF COMMON STOCK
 
     The Company's Common Stock has traded publicly under the symbol "HMTT"
since the Company's initial public offering on March 13, 1996. The following
table sets forth the closing prices for the Company's Common Stock as reported
on the Nasdaq National Market for the periods indicated below.
 
<TABLE>
<CAPTION>
                                                                     HIGH            LOW
                                                                   ---------       -------
        <S>                                                        <C>             <C>
        FISCAL YEAR ENDED MARCH 31, 1996
          Fourth Quarter (from March 13, 1996)...................     $11  1/2        $ 9 7/8
 
        FISCAL YEAR ENDED MARCH 31, 1997
          First Quarter..........................................     $28  1/4        $10 1/2
          Second Quarter.........................................      21  3/4         12 3/4
          Third Quarter..........................................      21 11/16        12 5/8
          Fourth Quarter.........................................      22              12 1/4
 
        FISCAL YEAR ENDING MARCH 31, 1998
          First Quarter..........................................     $14  5/8        $10
          Second Quarter (through August 13, 1997)...............      16 11/16        12 3/8
</TABLE>
 
     As of June 30, 1997, there were approximately 237 holders of Common Stock.
On August 13, 1997, the last sale price reported on the Nasdaq National Market
for the Common Stock was $14.94 per share.
 
                                       14
<PAGE>   15
 
                                 CAPITALIZATION
 
     The following table sets forth the capitalization of the Company as of June
30, 1997 (i) on an actual basis and (ii) as adjusted to reflect the net proceeds
of the sale of Common Stock by the Company in the Offerings (at the public
offering price of $14.50 per share). See "Use of Proceeds." This table should be
read in conjunction with the Company's Consolidated Financial Statements and the
Notes thereto which are included in the Company's Annual Report on Form 10-K and
are incorporated by reference into this Prospectus.
<TABLE>
<CAPTION>
                                                                           JUNE 30, 1997
                                                                      ------------------------
                                                                       ACTUAL      AS ADJUSTED
                                                                      --------     -----------
<S>                                                                   <C>          <C>
                                                                            (UNAUDITED)
 
<CAPTION>
                                                                           (IN THOUSANDS)
<S>                                                                   <C>          <C>
5 3/4% Convertible Subordinated Notes due 2004......................  $230,000      $ 230,000
Obligations under capital leases....................................     4,776          4,776
Stockholders' equity:
  Common Stock, $0.001 par value, 100,000,000 shares authorized,
     41,228,793 issued and outstanding, actual; 42,228,793 shares
     issued and outstanding, as adjusted(1).........................        41             42
  Additional paid-in capital........................................    93,161        106,550
  Retained earnings.................................................    95,307         95,307
  Distribution in excess of basis...................................   (76,649)       (76,649)
                                                                       -------        -------
     Total stockholders' equity.....................................   111,860        125,250
                                                                       -------        -------
       Total capitalization.........................................  $346,636      $ 360,026
                                                                       =======        =======
</TABLE>
 
- ---------------
 
(1) Based on shares outstanding as of June 30, 1997. Excludes as of such date
    4,023,143 shares of Common Stock issuable upon exercise of outstanding stock
    options at a weighted average exercise price of $5.61 per share and 210,397
    shares issuable upon exercise of an outstanding warrant at an exercise price
    of $0.0003 per share.
 
                                       15
<PAGE>   16
 
                      SELECTED CONSOLIDATED FINANCIAL DATA
 
     The following selected consolidated financial data of the Company are
qualified in their entirety by, and should be read in conjunction with, the
Management's Discussion and Analysis of Financial Condition and Results of
Operations included elsewhere in this Prospectus and the Consolidated Financial
Statements of the Company, including the notes thereto, incorporated by
reference into this Prospectus. The Consolidated Statements of Operations Data
for the years ended March 31, 1993, 1994, 1995, 1996 and 1997 and the
Consolidated Balance Sheet Data as of March 31, 1995, 1996 and 1997 are derived
from, and are qualified by reference to, the audited Consolidated Financial
Statements incorporated by reference into this Prospectus. The consolidated
statements of operations data for the three months ended June 30, 1996 and 1997,
and the consolidated balance sheet data at June 30, 1997 are derived from
unaudited financial statements incorporated by reference into this Prospectus.
In the opinion of management of the Company, the unaudited consolidated
financial data presented below provide all adjustments, which include only
normal recurring adjustments, necessary for a fair presentation of the results
of operations for the periods specified. Such results, however, are not
necessarily indicative of the results to be expected for the full fiscal year.
 
<TABLE>
<CAPTION>
                                                                                                              THREE MONTHS ENDED
                                                                       YEAR ENDED MARCH 31,                        JUNE 30,
                                                        ---------------------------------------------------   -------------------
                                                          1993       1994      1995       1996       1997       1996       1997
                                                        --------   --------   -------   --------   --------   --------   --------
                                                                          (IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                                                     <C>        <C>        <C>       <C>        <C>        <C>        <C>
STATEMENT OF OPERATIONS DATA:
Net sales.............................................  $ 70,987   $ 64,242   $72,893   $194,401   $263,209   $ 76,420   $ 76,837
Cost of sales.........................................    76,237     67,648    67,539    119,803    156,277     44,014     47,476
                                                        --------   --------   -------   --------   --------   --------   --------
Gross profit (loss)...................................    (5,250)    (3,406)    5,354     74,598    106,932     32,406     29,361
                                                        --------   --------   -------   --------   --------   --------   --------
Operating expenses:
  Research and development............................     2,499      2,781     3,130      3,803      5,812      1,260      1,902
  Selling, general and administrative.................     4,725      5,115     4,230      7,774     11,803      3,036      3,818
  Recapitalization expenses...........................        --         --        --      4,347         --         --         --
                                                        --------   --------   -------   --------   --------   --------   --------
    Total operating expenses..........................     7,224      7,896     7,360     15,924     17,615      4,296      5,720
                                                        --------   --------   -------   --------   --------   --------   --------
Operating income (loss)...............................   (12,474)   (11,302)   (2,006)    58,674     89,317     28,110     23,641
Interest expense, net.................................     4,806      6,001     6,915      8,578      3,329      1,048      1,685
                                                        --------   --------   -------   --------   --------   --------   --------
Income (loss) before income tax provision (benefit)
  and extraordinary debt extinguishment costs.........   (17,280)   (17,303)   (8,921)    50,096     85,988     27,062     21,956
Income tax provision (benefit)........................      (224)        22        20      2,590     25,400     10,284      6,587
                                                        --------   --------   -------   --------   --------   --------   --------
Net income (loss) before extraordinary debt
  extinguishment costs................................   (17,056)   (17,325)   (8,941)    47,506     60,588     16,778     15,369
Extraordinary debt extinguishment costs, net of income
  taxes...............................................        --         --        --      1,127         --         --         --
                                                        --------   --------   -------   --------   --------   --------   --------
Net income (loss).....................................   (17,056)   (17,325)   (8,941)    46,379     60,588     16,778     15,369
Accretion reversal (accretion) for dividends on
  Mandatorily Redeemable Series A Preferred Stock.....        --         --        --     (1,157)     1,157       (883)        --
                                                        --------   --------   -------   --------   --------   --------   --------
Net income (loss) available for common stockholders...  $(17,056)  $(17,325)  $(8,941)  $ 45,222   $ 61,745   $ 15,895   $ 15,369
                                                        ========   ========   =======   ========   ========   ========   ========
Net income (loss) available for common stockholders
  per share(1)
  Primary.............................................    $(0.49)    $(0.50)   $(0.26)     $1.28      $1.40      $0.36      $0.35
  Fully diluted.......................................    $(0.49)    $(0.50)   $(0.26)     $1.28      $1.35      $0.36      $0.31
Shares used in computing per share amounts(1)
  Primary.............................................    34,822     34,822    34,822     35,224     44,185     44,015     44,121
  Fully diluted.......................................    34,822     34,822    34,822     35,224     46,027     44,015     53,805
</TABLE>
 
<TABLE>
<CAPTION>
                                                                                                               JUNE 30, 1997
                                                                                MARCH 31,                  ---------------------
                                                                    ----------------------------------                     AS
                                                                      1995         1996         1997        ACTUAL      ADJUSTED
                                                                    --------     --------     --------     --------     --------
                                                                                           (IN THOUSANDS)
<S>                                                                 <C>          <C>          <C>          <C>          <C>
BALANCE SHEET DATA:
Working capital (deficit).........................................  $(82,715)    $ 45,899     $ 71,827     $ 61,513     $ 74,903
Total assets......................................................    75,936      165,786      373,389      406,252      419,642
Long-term and senior bank debt, less current portion..............     9,750           --           --           --           --
Subordinated promissory notes payable to stockholders(2)..........        --       47,000           --           --           --
Mandatorily Redeemable Series A Preferred Stock(2)................        --       60,157           --           --           --
5 3/4% Convertible Subordinated Notes due 2004(2).................        --           --      230,000      230,000      230,000
Total stockholders' equity (deficit)..............................   (51,550)      19,524       95,442      111,860      125,250
</TABLE>
 
- ---------------
 
(1) See Note 1 of Notes to the Consolidated Financial Statements included in the
    Company's Annual Report on Form 10-K and incorporated by reference into this
    Prospectus for an explanation of the determination of the number of shares
    used in computing per share amounts.
 
(2) The subordinated promissory notes and Mandatorily Redeemable Series A
    Preferred Stock, which were issued in conjunction with the Company's
    leveraged recapitalization in November 1995, were repaid with a portion of
    the proceeds of the sale of the 5 3/4% Convertible Subordinated Notes due
    2004 in January 1997. See "Management's Discussion and Analysis of Financial
    Condition and Results of Operations -- Leveraged Recapitalization."
 
                                       16
<PAGE>   17
 
                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                 FINANCIAL CONDITION AND RESULTS OF OPERATIONS
 
     This Management's Discussion and Analysis of Financial Condition and
Results of Operations and other parts of this Prospectus contain forward-looking
statements that involve risks and uncertainties. The Company's actual results
may differ significantly from the results discussed in the forward-looking
statements. Factors that might cause such a difference include, but are not
limited to, those discussed under the heading entitled "Risk Factors." The
following discussion of the Company's financial condition and results of
operations should be read in conjunction with the Company's Consolidated
Financial Statements and notes thereto incorporated by reference into this
Prospectus.
 
OVERVIEW
 
     HMT Technology Corporation is an independent supplier of high-performance
thin film disks for high-end, high-capacity hard disk drives, which in turn are
used in high-end PCs, network servers and workstations. HMT was incorporated in
1988 as a subsidiary of Hitachi Metals, Ltd. ("Hitachi Metals") for the purpose
of acquiring certain assets and certain liabilities of the thin film division of
Xidex Corporation, which had been producing thin film disks since 1983. Since
completing the Xidex acquisition, the Company has continued to supply thin film
disks to manufacturers of hard disk drives. Beginning in fiscal 1995, HMT's
management team, many of whom had joined the Company since February 1994,
refocused the strategy and operations of the Company. The new management
concentrated on the 3 1/2-inch disk form factor, focused on the high-end,
high-capacity segment of the disk drive market and expanded the Company's
customer base. In addition, HMT implemented an extensive quality assurance
program, developed proprietary manufacturing processes and optimized production
capacity utilization. These changes resulted in higher production volumes, lower
unit costs, and higher average selling prices primarily associated with new
high-end products. As a result, the Company has increased sales and improved
gross margins, achieving net income of $46.4 million for fiscal 1996 and $60.6
million for fiscal 1997 compared with a net loss of $8.9 million for fiscal
1995.
 
LEVERAGED RECAPITALIZATION
 
     On November 30, 1995 the Company effected a leveraged recapitalization (the
"Leveraged Recapitalization") pursuant to which the Company repurchased from
Hitachi Metals, then the sole stockholder of the Company, all of the outstanding
shares of Common Stock of the Company, and certain investment funds, members of
management and Hitachi Metals purchased Common Stock, Mandatorily Redeemable
Series A Preferred Stock and subordinated promissory notes of the Company. The
Leveraged Recapitalization and related transactions consisted of: (i) the
repurchase by the Company from Hitachi Metals of shares of Common Stock
representing all the outstanding capital stock of the Company for an aggregate
purchase price of $52.1 million in cash; (ii) the recapitalization of the
Company through the issuance of 21,968,057 shares of Common Stock for an
aggregate purchase price of approximately $0.7 million, 5,900,000 shares of
Mandatorily Redeemable Series A Preferred Stock ("Series A Preferred Stock") for
an aggregate purchase price of approximately $59.0 million, $47.0 million of
subordinated promissory notes ("Subordinated Notes") and $60.0 million in senior
debt with associated warrants to purchase 701,344 shares of Common Stock at an
exercise price of $0.0003 per share and (iii) the grant of options to purchase
11,451,865 shares of Common Stock under the 1995 Management Stock Option Plan
and the 1995 Stock Option Plan. The purchasers of the Company's securities in
the Leveraged Recapitalization included certain investment funds affiliated with
Summit Partners, L.P. ("Summit Partners") and certain other investment funds,
the Company's management and employees and Hitachi Metals. The terms of the
Leveraged Recapitalization were determined through negotiations between Hitachi
Metals and Summit Partners, who, prior to the Leveraged Recapitalization, did
not have any affiliation with the Company. Pursuant to these negotiations, the
shares of Common Stock were valued at $0.03 per share. The Series A Preferred
Stock was valued at $10.00 per share, and the Subordinated Notes were valued at
face value. The values of these securities were confirmed by a third party
appraisal. The Leveraged Recapitalization was accounted for as a
recapitalization, and accordingly, no change in the accounting basis of the
Company's assets has been made. As of
 
                                       17
<PAGE>   18
 
November 30, 1995 (immediately prior to the Leveraged Recapitalization), the
Company had $98.5 million in assets and $122.7 million in liabilities.
Immediately following the Leveraged Recapitalization, the Company had $110.9
million in assets, $132.1 million in liabilities (including a $60.0 million
senior bank term loan and $47.0 million of Subordinated Notes) and $59.0 million
of Series A Preferred Stock.
 
     During March and April 1996, the Company sold 9,660,000 shares of Common
Stock at $10.00 per share (including exercise of the underwriters'
over-allotment option) through its initial public offering. The net proceeds
(after underwriter's discounts and commissions and other costs associated with
the initial public offering) totaled $88.7 million. In January 1997, the Company
completed a $230 million private placement of 5 3/4% Convertible Subordinated
Notes due 2004 (the "Convertible Notes") to qualified institutional investors,
resulting in net proceeds of approximately $222.5 million (after offering
costs). Proceeds from the issuance of the Convertible Notes were used to fully
redeem the $59 million of Series A Preferred Stock and to prepay the $47 million
principal balance of the Subordinated Notes issued pursuant to the Leveraged
Recapitalization plus accrued interest and to fully repay $41 million in long-
term borrowings outstanding.
 
     Due to the changes in ownership resulting from the Leveraged
Recapitalization, utilization of net operating losses is limited to
approximately $0.8 million per year over the loss carryforward period (expiring
between 2008 and 2010). The benefit from the net operating losses was recorded
in the quarter ended December 31, 1995. Had the Company been obligated to pay
taxes at the statutory rates for fiscal 1996, net income would have been $30.7
million.
 
RESULTS OF OPERATIONS
 
     The following table sets forth certain operating data as a percentage of
net sales for the periods indicated:
 
<TABLE>
<CAPTION>
                                                                                               THREE MONTHS
                                                           YEAR ENDED MARCH 31,               ENDED JUNE 30,
                                                 -----------------------------------------    --------------
                                                 1993     1994     1995     1996     1997     1996     1997
                                                 -----    -----    -----    -----    -----    -----    -----
<S>                                              <C>      <C>      <C>      <C>      <C>      <C>      <C>
STATEMENT OF OPERATIONS DATA:
Net sales.....................................   100.0%   100.0%   100.0%   100.0%   100.0%   100.0%   100.0%
Cost of sales.................................   107.4    105.3     92.7     61.6     59.4     57.6     61.8
                                                 -------  -------  -------  -------  -------  -------  -------
Gross profit (loss)...........................    (7.4)    (5.3)     7.3     38.4     40.6     42.4     38.2
                                                 -------  -------  -------  -------  -------  -------  -------
Operating expenses:
  Research and development....................     3.5      4.3      4.3      2.0      2.2      1.6      2.5
  Selling, general and administrative.........     6.7      8.0      5.8      4.0      4.5      4.0      4.9
  Recapitalization expenses...................     0.0      0.0      0.0      2.2      0.0      0.0      0.0
                                                 -------  -------  -------  -------  -------  -------  -------
    Total operating expenses..................    10.2     12.3     10.1      8.2      6.7      5.6      7.4
                                                 -------  -------  -------  -------  -------  -------  -------
Operating income (loss).......................   (17.6)   (17.6)    (2.8)    30.2     33.9     36.8     30.8
Interest expense, net.........................     6.7      9.3      9.4      4.4      1.3      1.4      2.2
                                                 -------  -------  -------  -------  -------  -------  -------
Income (loss) before income tax provision
  (benefit) and extraordinary debt
  extinguishment costs........................   (24.3)   (26.9)   (12.2)    25.8     32.6     35.4     28.6
Income tax provision (benefit)................    (0.3)     0.1      0.1      1.3      9.6     13.4      8.6
Extraordinary debt extinguishment costs, net
  of income taxes.............................     0.0      0.0      0.0      0.6      0.0      0.0      0.0
                                                 -------  -------  -------  -------  -------  -------  -------
Net income (loss).............................   (24.0%)  (27.0%)  (12.3%)   23.9%    23.0%    22.0%    20.0%
                                                 =======  =======  =======  =======  =======  =======  =======
</TABLE>
 
     Three Months Ended June 30, 1996 and 1997
 
     Net Sales. Net sales increased 0.5% in the three months ended June 30, 1997
to $76.8 million, representing an increase of $417,000 compared to the three
months ended June 30, 1996. Unit sales volume increased 32.9% during the three
months ended June 30, 1997, while average selling prices declined 26.3%,
compared to the three months ended June 30, 1996. The increase in unit sales
volume
 
                                       18
<PAGE>   19
 
during the three months ended June 30, 1997 was primarily attributable to an
increase in manufacturing capacity, as a result of the Company's facility
expansion and the installation of additional sputtering lines. Five additional
sputtering lines were brought into service during the nine months ended March
31, 1997 and two were brought into service during the three months ended June
30, 1997. Improved utilization of existing capacity, as well as improved
manufacturing processes, also contributed to higher production volume and unit
shipments. The ability to increase revenue will depend upon an increase in
overall unit production volume.
 
     During the three months ended June 30, 1997, three customers individually
accounted for at least ten percent of consolidated net sales: Iomega (32.1%),
Samsung (27.7%), and Western Digital (18.7%). During the three months ended June
30, 1996, three customers accounted for at least ten percent of consolidated net
sales: Maxtor (43.3%), Western Digital (17.5%) and Iomega (15.6%). The Company
expects that it will continue to derive a substantial portion of its sales from
a relatively small number of customers, although the identity of such customers
may change from period to period.
 
     Gross Profit. Gross margin was 38.2% for the three months ended June 30,
1997, compared with 42.4% for the three months ended June 30, 1996. The decline
in gross margin during the three months ended June 30, 1997 was a result of the
26.3% decline in average selling prices versus the comparable period in fiscal
1997, offset in part by decreased unit production costs, improved utilization of
manufacturing capacity, improved manufacturing processes, and the absorption of
fixed costs over higher unit production volume. Production of substrates at the
Eugene, Oregon manufacturing facility (which was acquired during the three
months ended June 30, 1996) and lower substrate and other raw material prices
also contributed to decreases in unit costs in the three months ended June 30,
1997 compared to the same three month period in fiscal 1997.
 
     Research and Development. Research and development expenses increased
$642,000 in the three months ended June 30, 1997, compared to the same period in
1996. Research and development expenses increased primarily due to an increase
in headcount related to the Company's new product introductions and expanded
research efforts to support the Company's overall capacity expansion.
 
     Selling, General and Administrative. Selling, general and administrative
expenses increased $782,000 in the three months ended June 30, 1997, compared to
the same period in the prior fiscal year. The increase in selling, general and
administrative expenses primarily reflected the increased headcount necessary to
support higher production volume and unit shipments. The Company anticipates
that operating expenses will continue to increase in absolute dollars as
headcount is increased to support new product introductions, and anticipated
higher levels of production volume and unit shipments, although, as a percentage
of net sales, operating expenses may fluctuate from period to period.
 
     Interest Expense, Net. Net interest expense increased $637,000 during the
three months ended June 30, 1997, compared to the same period in fiscal 1997, a
result of the increased debt balance, partially offset by $1.4 million in
interest that was capitalized during the same period.
 
     Provision for Income Taxes. For the three months ended June 30, 1997, the
Company recorded income taxes at its estimated annual effective tax rate of 30%.
During the three months ended June 30, 1996, income taxes were recorded at a
rate of 38%, reflecting the estimated annual rate at that time.
 
     Fiscal Years Ended March 31, 1995, 1996 and 1997
 
     Net Sales. Net sales were $72.9 million in fiscal 1995, $194.4 million in
fiscal 1996, and $263.2 million in fiscal 1997. This represented an increase of
166.6% from fiscal 1995 to fiscal 1996, and an increase of 35.4% from fiscal
1996 to fiscal 1997. The increase in net sales in fiscal 1996 compared to fiscal
1995 was primarily attributable to an increase in manufacturing capacity,
primarily from improved utilization of existing capacity, improved manufacturing
processes, and increased yields, resulting in higher production volume and unit
shipments, as well as higher average selling prices primarily associated with
the sale of new high-end products. The increase in net sales in fiscal 1997 was
primarily attributable to an increase in manufacturing capacity, resulting from
the addition of new sputtering lines,
 
                                       19
<PAGE>   20
 
and improved utilization of existing capacity and improved manufacturing
processes, resulting in higher production volume and unit shipments. The unit
sales volume increased 104% from fiscal 1995 to fiscal 1996 and 60% from fiscal
1996 to fiscal 1997 while average selling prices increased 31% and decreased 16%
over the same periods, respectively. The Company anticipates that average
selling prices will fluctuate with industry supply and demand. Substantially all
of the Company's net sales consist of products delivered to customers in Asia,
primarily foreign subsidiaries of U.S. companies.
 
     Gross Profit. Gross margin was 7.3% in fiscal 1995, 38.4% in fiscal 1996
and 40.6% in fiscal 1997. Increased yields in fiscal 1996, and a manufacturing
disruption experienced during the last quarter of fiscal 1995 helped contribute
to improved margins in fiscal 1996 compared to fiscal 1995. The increases in
gross margin in fiscal 1996 and fiscal 1997 were primarily a result of decreased
unit production costs, improved utilization of manufacturing capacity, improved
manufacturing processes, and the absorption of fixed costs over higher unit
production volume. Production of aluminum and nickel plated substrates at the
Eugene, Oregon manufacturing facility (which was acquired during the first
quarter of fiscal 1997) and lower substrate and other raw material prices also
contributed to a decrease in unit cost during fiscal 1997.
 
     Research and Development. Research and development expenses were $3.1
million, or 4.3% of net sales, in fiscal 1995, $3.8 million, or 2.0% of net
sales, in fiscal 1996, and $5.8 million, or 2.2% of net sales, in fiscal 1997.
Research and development expenses increased in absolute dollars in fiscal 1996
and fiscal 1997 due to an increase in headcount related to the Company's new
product introductions, as well as increased efforts to expand research and to
provide enabling technology elements for advanced products. The decrease of
research and development expenses as a percentage of net sales in fiscal 1996
was primarily a result of the substantial increase in net sales over the same
period. The Company develops manufacturing processes for new products directly
on active production lines during the research and development phase, avoiding
the need for substantial capital investment in dedicated research equipment. The
Company anticipates that research and development expenses will increase in
absolute dollars in future periods, although as a percentage of net sales,
research and development expenses may fluctuate.
 
     Selling, General and Administrative. Selling, general and administrative
expenses were $4.2 million, or 5.8% of net sales, in fiscal 1995, $7.8 million,
or 4.0% of net sales, in fiscal 1996 and $11.8 million, or 4.5% of net sales, in
fiscal 1997. The fiscal 1996 and fiscal 1997 increase in selling, general and
administrative expenses in absolute dollars primarily reflected increased
headcount necessary to support higher production volume and unit shipments. The
fiscal 1996 decline in selling, general and administrative expenses as a
percentage of net sales primarily reflected the increase in net sales over the
same period, partially offset by an increase in the selling, general and
administrative expenses in absolute dollars. The Company anticipates that
selling, general and administrative expenses will continue to increase in
absolute dollars as headcount is increased to support anticipated higher levels
of production volume, although as a percentage of net sales, selling general and
administrative expenses may fluctuate from period to period.
 
     Recapitalization Expenses. The Company effected the Leveraged
Recapitalization on November 30, 1995, and recorded a $4.3 million charge for
related expenses for the quarter ended December 31, 1995.
 
     Interest Expense, Net. Interest expense, net was $6.9 million, or 9.4% of
net sales, in fiscal 1995, $8.6 million, or 4.4% of net sales, in fiscal 1996
and $3.3 million, or 1.3% of net sales, in fiscal 1997. The fiscal 1996 increase
in absolute dollars was primarily a result of higher average debt balances and
interest rates, as compared to fiscal 1995. The fiscal 1997 decrease was
primarily a result of interest earned on excess cash balances, lower average
debt balances and a $2.4 million increase in capitalized interest. The Company
anticipates interest expense, net will increase in absolute dollars as a result
of higher average debt balances (a result of the completion of the sale of the
Convertible Notes in January 1997), lower invested cash balances and lower
capitalized interest as construction-in-progress balances decrease.
 
                                       20
<PAGE>   21
 
     Provision for Income Taxes. The Company recorded income tax provisions of
$20,000, $2.6 million and $25.4 million in fiscal 1995, 1996 and 1997,
respectively.
 
     Due to a loss in fiscal 1995, the Company required no federal income tax
provision. The income tax provision recorded during fiscal 1995 was based upon
state income taxes of Hitachi Metals allocated to the Company. During fiscal
1996, the Company assessed the recoverability of deferred tax assets and, based
on expectations about operating results for the fiscal year ending March 31,
1997 and future years, determined it was more likely than not that the entire
balance of deferred tax assets would be recovered. As the facts that supported
the reduction of the valuation allowance related to the period immediately
following the Leveraged Recapitalization, the Company reduced its fiscal 1996
income tax expense by approximately $6.9 million to reflect the tax benefit
associated with recognition of deferred tax assets at December 31, 1995. The
recognition of deferred tax assets and the utilization of $12.7 million of net
operating loss carryforwards produced an effective tax rate of 5.2% for fiscal
1996.
 
     The fiscal 1997 tax rate of approximately 30% reflected statutory federal
and state rates, reduced primarily by benefits realized from the establishment
of a foreign sales corporation, utilization of state credits and implementation
of other state tax planning strategies.
 
     Extraordinary debt extinguishment costs, net of income taxes. The Company
repaid the balance of a senior bank term loan incurred in connection with the
Leveraged Recapitalization on March 14, 1996, after completion of its initial
public offering. As a result, the Company recorded a one-time non-cash charge of
$1.1 million, net of income taxes, for the write-off of the portion of
unamortized debt issue costs related to the senior bank term loan during fiscal
1996.
 
     Recent Pronouncements
 
     During February 1997, the Financial Accounting Standards Board issued
Statement No. 128, "Earnings per Share" (SFAS No. 128) which establishes
standards for computing and presenting earnings per share (EPS) more comparable
to international EPS standards. It replaces the presentation of primary EPS with
a presentation of basic EPS. It also requires dual presentation of basic and
diluted EPS on the face of the income statement for all entities with complex
capital structures and requires a reconciliation of the numerator and
denominator of the basic EPS computation to the numerator and denominator of the
diluted EPS computation. While the Company studies the impact of the
pronouncement, it continues to calculate EPS based on Accounting Pronouncements
Board Opinion No. 15, "Earnings per Share." SFAS No. 128 will be effective for
the Company's 1998 fiscal year, including interim periods, with a restatement of
all prior-period EPS data presented.
 
LIQUIDITY AND CAPITAL RESOURCES
 
     In fiscal 1995, the Company financed its cash requirements primarily
through cash from operations. During fiscal 1996 and fiscal 1997 and the three
months ended June 30, 1997, the Company financed its cash requirements through
cash from financing activities and operations.
 
     The Company's operations provided net cash of $8.7 million, $50.4 million,
$90.7 million and $30.9 million for fiscal 1995, 1996 and 1997 and for the three
months ended June 30, 1997, respectively. Cash generated during fiscal 1997
reflected net income plus depreciation and amortization, an increase in total
liabilities, and the utilization of deferred tax assets, partially offset by
increases in inventories and receivables. Increased sales and improved margins
contributed to the positive cash flow provided by operations in each of the past
two fiscal years. Cash generated during the three months ended June 30, 1997
reflected net income plus depreciation and amortization, as well as an increase
in accounts payable and current and long-term liabilities, partially offset by
increases in receivables and inventories.
 
     For fiscal 1996 and fiscal 1997 and for the three months ended June 30,
1997, net cash used in investing activities was $35.5 million, $208.2 million
and $37.8 million, respectively. The Company invested $39.6 million, $197.4
million and $39.8 million in property, plant and equipment during fiscal 1996
and fiscal 1997 and for the three months ended June 30, 1997, respectively.
 
                                       21
<PAGE>   22
 
     During fiscal 1996 and fiscal 1997 and for the three months ended June 30,
1997, net cash from financing activities was $20.0 million, $125.9 million and
$4,000, respectively. Cash provided by financing activities for fiscal 1997
reflects the issuance of $230.0 million in Convertible Notes, and the related
redemption of $59.0 million in Series A Preferred Stock, prepayment of the $47.0
million in Subordinated Notes, and repayment of $41.0 million in long-term
borrowings, as well as the receipt of $11.7 million from the exercise of the
underwriters' over-allotment option pursuant to the Company's initial public
offering.
 
     As of June 30, 1997, the Company's principal sources of liquidity consisted
of $46.4 million in cash, cash equivalents and short-term investments, and a
$50.0 million unsecured revolving credit facility under which there were no
borrowings. At June 30, 1997, the Company had indebtedness of $230.0 million in
Convertible Notes, that require semi-annual interest payments beginning July 15,
1997. The Company expects to spend in excess of $200 million on capital
expenditures directed toward expansion of production capacity over the next
twelve months.
 
     The Company believes existing cash balances, cash generated from
operations, and funds available under its credit facility will provide adequate
cash to fund its operations for at least the next twelve months. The Company
expects to have significant future obligations and expects that it may require
additional capital to support continued expansion of the Company's manufacturing
capacity and growth, if any. Additional sources of long-term liquidity could
include cash generated from operations and debt and equity financings. There can
be no assurance that the Company will be able to obtain alternative sources of
financing on favorable terms, if at all, at such time or times as the Company
may require such capital.
 
                                       22
<PAGE>   23
 
                                    BUSINESS
 
     This Prospectus contains forward-looking statements which involve risks and
uncertainties. The Company's actual results may differ significantly from the
results discussed in the forward-looking statements. Factors that might cause
such a difference include, but are not limited to, those discussed in "Risk
Factors."
 
     HMT is an independent supplier of high-performance thin film disks for
high-end, high-capacity hard disk drives, which in turn are used in high-end
personal computers ("PCs"), network servers and workstations. The disks
currently being shipped by the Company are primarily for disk drives with
storage capacities ranging from 2.0 to 10.0 gigabytes (using two to 12 disks),
and substantially all have coercivity levels of 2000 Oe or higher. The Company
also supplies high-performance thin film disks for removable hard disk drives.
Since March 1994, the Company has focused on addressing the needs of this
high-end, high-capacity segment of the disk drive market. HMT believes that its
recent operating results reflect its success in meeting these needs and that its
future growth and success depend on its ability to continue to develop and
market products that enable its customers to produce high-performance disk
drives for high-end data storage applications. The Company provides a range of
magnetic density points (coercivities), glide heights and disk thicknesses to
match the design and performance requirements of each particular customer. The
Company's principal customers currently include Maxtor, Samsung, Iomega, Western
Digital, Micropolis and Quantum.
 
INDUSTRY BACKGROUND
 
     The Disk Drive Market
 
     Market demand for disks and disk drives has been growing steadily,
stimulated by demand for new computers, upgrades to existing computers and the
growing use of sophisticated network servers. The introduction of increasingly
powerful microprocessors and more memory intensive software, combined with the
development and growth of multimedia computing applications and Internet usage,
have stimulated demand for PCs in both the home and business markets. According
to International Data Corporation ("IDC"), worldwide shipments of PCs were 59
million units in 1995 and 69 million units in 1996, and are projected to reach
approximately 117 million units in 2000. In addition, the PC server market,
driven by the trend toward networking applications and the expansion of the
Internet, is expected to grow substantially through the year 2000.
 
     The combined demand from the PC and PC server markets has resulted in
strong growth in unit shipments of disk drives. According to IDC, worldwide
shipments of hard disk drives were 105 million units in 1996 and are projected
to be 132 million units in 1997 and 223 million units in 2000. According to
Trend Focus, the worldwide market for hard disk drives was approximately $24
billion in 1996. Strong overall demand for disk drives has also stimulated the
growth of the thin film disk market. According to Trend Focus, there were 340
million thin film disks produced in 1996 with an estimated market value of $4.0
billion. Trend Focus projects that the total market for thin film disks will
reach 725 million units in 2000, with an estimated market value of $7.9 billion.
 
     The applications being developed for PCs require greater storage capacity
and, as a result, have sharply increased the demand for high-capacity disk
drives. Users purchasing newer PCs for business and home use are commonly
attracted by the availability of greater processing power, larger databases,
multimedia and other memory intensive applications and more sophisticated
operating systems, such as Windows 95 or Windows NT. Increasing use of the
Internet and on-line data, including image storage and retrieval, have further
stimulated the demand for storage capacity. The disk drive industry has
responded to this demand with significant technology and product advances. As a
result, mean storage capacity per disk drive has increased from 213 megabytes
("MB") in 1993 to 690 MB in 1995 to 2.7 GB in 1997. Meanwhile, the average
number of disks per drive has remained relatively constant at about 2.5 disks.
While storage capacity has grown, the cost per MB has fallen from $1.26 in 1993
to $0.32 in 1995 and to $0.10 in 1997. Today's market continues to generate
pressure for advances to facilitate these trends in computing, especially at the
high-end. Thus, the Company believes that success in the disk drive market
 
                                       23
<PAGE>   24
 
has depended and for the foreseeable future will depend on the ability of the
disk drive manufacturer, together with its suppliers of critical components,
such as thin film disks, to keep pace with these advances.
 
     Additionally, removable-media storage devices, including removable hard
disk drives, have received increased attention in the data storage market.
Removable hard disk drives utilize cartridges incorporating thin film disks and
combine the high-capacity and rapid access of hard disk drives with the benefits
of removability. These devices can be used peripherally to increase the storage
capacity for PCs.
 
     Disk Drive Technology
 
     The basic elements of the disk drive, sized to fit various industry form
factors, have remained essentially the same since hard disk drives were first
introduced. The principal components of a hard disk drive are disks, heads,
spindle and actuator mechanics and electronics. Each disk drive typically
contains from one to ten disks that are attached to a spindle/motor assembly
within a sealed enclosure. The electronics control the spinning of the disk, the
positioning of the head and the writing and retrieval of data stored on the
disk. The recording head is a small magnetic transducer that, when the disk is
spinning, "flies" just above the disk surface. Data are written on
circumferential tracks on the disk when the electronic channel sends current
pulses to the head. The head converts these pulses to magnetic fields that cause
the magnetic layer within the disk and under the recording head to become
magnetized, oriented in the direction of the head's magnetic field. Reversing
the current in the head reverses the direction of the magnetic field on the
disk. During the read-back process, as the head scans over the disk, magnetic
flux from the disk's magnetic layer is picked up by the head and induces an
electrical current which is converted into voltage. The output signal voltage is
then transformed into digital data by the read channel electronics. The
following diagram illustrates the principal components of a typical hard disk
drive:

[Diagram of typical hard disk drive with arrows indentifying key components:
disks, spindle, recording head, and electronics.] 

     Major improvements in disk drive performance have been based on
technological advances in the principal components. In a typical disk drive
today, the spindle/motor assembly rotates the disk at 5,200 to 10,000
revolutions per minute. The head reads and writes data onto the spinning disk
while flying at a height of 0.7 to 1.7 microinches (0.018 to 0.04 micron) at
data transfer rates of 70 to 130 megabits per second. The combination of modern
head and disk technologies enables this drive to store data on 5,000 to 8,000
circumferential tracks per radial inch on the disk with 100,000 to 160,000 bits
of data per inch along each track.
 
     Thin Film Disk Technology
 
     A thin film disk is composed of a substrate, generally aluminum, coated
with thin films capable of storing information in the form of magnetic patterns.
The manufacturing of thin film disks is a multi-step process using processes
similar to those used for the production of silicon wafers for semiconductors.
The manufacturing process involves the deposition of extremely thin, uniform
layers of magnetic film onto a substrate using a sputtering process, by either a
static or in-line system, similar to that used to coat
 
                                       24
<PAGE>   25
 
silicon wafers. The basic process consists of many interrelated steps and
requires an extremely clean environment. Minor deviations in the manufacturing
process, minute impurities in materials used, particulate contamination or other
problems can cause significant numbers of disks to be rejected, thereby causing
significant yield loss.
 
     The most significant technological challenges facing disk manufacturers
today are associated with market demand for increased storage capacity and
durability. An effective implementation of thin film technology to meet these
challenges must address various performance-related characteristics, including
magnetics, glide height, durability and static friction ("stiction").
 
     - Magnetics. Coercivity, a measure of the magnetic strength of the disk, is
       expressed in Oersted ("Oe"). The coercivity of the disk is determined by
       the types of disk substrate and thin film materials used, substrate
       surface conditions before disk sputtering, and the conditions that exist
       during the sputtering process, including temperature, vacuum and possible
       sources of disk contamination. As areal density increases, higher
       coercivity is needed to permit sharper transitions between magnetized
       regions. This allows each bit of data to be stored in a smaller area, and
       therefore more data can be stored in the same disk area. Advanced drive
       designs currently require coercivities in the range of 2000 to 2400 Oe,
       compared to a range of 950 to 1200 Oe seven years ago. The Company
       believes that most high-end disk drive manufacturers will require
       coercivities of 2400 Oe and above by the end of 1997. HMT currently
       manufactures and sells disks in commercial quantities with coercivities
       ranging from 2000 to 2400 Oe, with more than 50% of the Company's
       revenues during the three months ended March 31, 1997 deriving from disks
       with coercivities of 2200 Oe and above. The Company is also currently
       producing small quantities of disks for use in customer development
       programs with coercivities of up to 3000 Oe.
 
     - Glide Height. The glide height of the disk is the measure of the height
       at which the head can fly over the disk without hitting anything and is a
       standard used in the specification of the disk. The actual flying height
       of the head in the disk drive is higher than the glide height to provide
       a margin for safety. Glide height depends on the smoothness and flatness
       of the disk surface. The lower the disk head flies above the disk
       surface, the more accurately the head can read the magnetic signal,
       allowing a smaller magnetized region to store each bit of data and
       thereby contributing to increases in areal density. While the current
       industry standard glide height is 1.5 microinches, the Company expects
       that glide heights will decrease to 1.0 microinch by the end of 1997. The
       Company currently manufactures and sells disks in commercial quantities
       with glide heights of 1.5 microinches to 1.0 microinch.
 
     - Durability Through Start/Stop Cycles. In most hard disk drives, the head
       and disk come into contact when the disk drive is turned off and the head
       rests directly on the inner diameter of the disk. To prevent wear on the
       disk, a protective overcoat is deposited over the magnetic layer of the
       disk. However, the thickness of this overcoat must be minimized because
       this layer increases the distance of the head from the magnetic layer,
       thereby reducing the strength of the magnetic signal reaching the head.
       Customer specifications typically require 60,000 start/stop cycles for
       desktop PCs.
 
     - Stiction. Stiction is the static friction that occurs when two smooth
       surfaces come into contact. In the case of hard disk drives, an extremely
       smooth disk surface enables lower glide heights and can enhance
       durability by reducing the friction which occurs when the head contacts
       the disk. However, if a disk is too smooth, stiction will cause the head
       to adhere to the disk surface when the drive is turned on and off,
       causing irreparable damage to the hard disk drive. Disk manufacturers
       minimize this problem primarily through texturizing the disk surface in a
       controlled manner.
 
     Disk manufacturers cannot simply address each performance characteristic
discretely because the interplay among characteristics significantly impacts the
overall performance of the disk. For example, a protective overcoat that yields
a highly durable disk may well reduce the disk's potential storage capacity.
 
                                       25
<PAGE>   26
 
     Challenges Facing the Disk Drive Industry
 
     Despite technological advances in components, including thin film disks,
and the prospects for continued data storage market growth, disk drive
manufacturers face a demanding marketplace. A strong competitive position is
best achieved through continual innovation. Improvements in product performance
characteristics, designed to meet the growing demands for increased storage
capacity, play an integral part in allowing the manufacturer to generate
acceptable gross margins. However, in the highly competitive disk drive
industry, other manufacturers have generally been able to develop comparable
products within a relatively short time. The likelihood of rapidly decreasing
profitability over the life cycle of any given product provides a strong
incentive for manufacturers to innovate. This results in extremely short product
cycles, currently estimated to be from nine to twelve months.
 
     Disk drive manufacturers participating in the high-end, high-capacity disk
drive market segment can realize higher gross margins by successfully addressing
the need for drives capable of supporting today's demand for high-performance,
value-added computing products. In this segment, which supplies products
incorporated into high-end PCs, network servers and workstations, users are less
price sensitive than typical home PC consumers because they have a more
compelling need for a value-added product. Because of the short product cycles
and the significant technology improvements incorporated into each new
generation of high performance disk drives, the need to be in the forefront of
technological advances is particularly great for companies competing in this
segment.
 
     Disk drive manufacturers can produce higher capacity products by putting
more disks in a drive or coupling a number of drives together in an array. These
approaches are limited by form factor constraints and technical complexity.
These are also relatively high cost solutions since the drive manufacturer is
adding more componentry. A more cost-effective solution is to develop a product
that can store more data using the same number of components. Thus, disk drive
manufacturers generally have relied on the development of new head technologies
and of thin film disks with improved areal density characteristics to support
generational advances in storage capacity and performance.
 
THE HMT APPROACH
 
     HMT focuses on providing value-added technological solutions that meet the
demands of the high-end, high-capacity disk drive market. The Company develops,
manufactures and sells technologically advanced products designed to provide
improved performance, principally through achieving higher coercivities and
lower glide heights. The Company seeks to be a supplier to disk drive
manufacturers with a proven record for technological leadership because these
customers have the greatest ability to fully exploit the value of
technologically superior disks. By working with such high-end customers and
their head vendors, HMT can influence leading edge disk drive designs and earn a
strong position as a supplier of disks for these products.
 
STRATEGY
 
     The key elements of HMT's strategy are as follows:
 
     -  Establish and Maintain Leadership in High-End Product Technology. The
        Company focuses its development resources principally on performance
        improvements for disks sold to the high-end, high-capacity segment of
        the disk drive industry. In order to improve product performance
        characteristics, including magnetics, glide height, durability and
        stiction, HMT is continually engaged in efforts to enhance its
        proprietary technologies and processes. For example, efforts in the
        alloy and process development area, focusing largely on non-precious
        metal alloys, are directed toward improving disk coercivity above the
        3000 Oe level.
 
     -  Develop Collaborative Relationships with Leading Head and Disk Drive
        Manufacturers. The Company works closely with head manufacturers
        developing new technologies, including TRI-PAD compatible and MR-head
        ready disks. This collaboration enables the parties to develop
        compatible products that can be effectively incorporated together into
        leading edge disk drives.
 
                                       26
<PAGE>   27
 
        HMT also seeks to establish strong relationships with its customers,
        enabling the Company to participate in establishing technological and
        design requirements for new products. The Company believes that close
        technical collaboration with its customers and their other suppliers
        during the design phase of new disk drives facilitates integration of
        the Company's products into new drives, improves the Company's ability
        to reach cost effective high volume manufacturing rapidly and enhances
        the likelihood that the Company will become a primary supplier of thin
        film disks for high-performance disk drive products.
 
     -  Develop Advanced Manufacturing Processes to Support Volume
        Production. HMT develops advanced manufacturing processes directly on
        state-of-the-art production equipment. Developing manufacturing
        processes for new products directly on active production lines during
        the research and development phase increases the likelihood that the
        Company can quickly and efficiently transition to high volume commercial
        production of new products. The ability to implement new processes
        quickly also helps the Company meet its customers' increasingly rapid
        time-to-market demands and advances its goal of having its products
        designed into its customers' disk drives.
 
     -  Expand Manufacturing Capacity. The Company recently completed
        construction of a new 124,000 square foot production facility at its
        Fremont, California site. The administrative office areas and six
        production scale sputtering lines were brought into service by the end
        of the first quarter of fiscal 1998. The Company plans to install up to
        10 additional production scale sputtering lines in this new facility. In
        addition, the Company completed an expansion of its facility in Eugene,
        Oregon during fiscal 1997, where it produces aluminum substrates and
        nickel-plated and polished substrates. The Company expects that added
        capacity will enable it to improve its ability to meet the demands of
        current customers and position it to take advantage of additional market
        opportunities.
 
     -  Maintain Strict Quality Control of Manufacturing Process. HMT believes
        that its close attention to quality control results in a consistent
        product and high production yields and is key to its success. Attention
        to quality has the dual benefit of producing high-performance disks and
        lowering the Company's cost of production. In addition, product quality
        is an essential factor in the supplier certification process of disk
        drive manufacturers.
 
PRODUCTS
 
     The Company provides a range of magnetic density points (coercivities),
glide heights and disk thicknesses. HMT currently manufactures and sells disks
in commercial quantities with substantially all having coercivities levels of
2000 Oe or higher and glide heights of 1.5 microinches or less. The Company is
also currently producing small quantities of disks for use in customer
development programs with coercivities of up to 3000 Oe.
 
     The Company's product mix continually shifts as technological advances are
implemented in anticipation of demand for disks with improved performance
characteristics and the Company transitions production from less technologically
sophisticated disks still in active use. For example, during the three months
ended March 31, 1995, 1800 Oe and below products comprised 95.0% of total units
shipped. In the three months ended March 31, 1997, substantially all products
shipped were 2000 Oe and above, with more than 50% of the units shipped having
coercivities of 2200 Oe and above.
 
     As of June 30, 1997, the Company's disks were used by seven disk drive
manufacturers in 11 different 3 1/2-inch disk drive products. Currently, the
Company's products are used in fixed disk drives that have capacities ranging
from 2.0 GB to 10.0 GB with storage capacity per disk ranging from 750 MB to 1.5
GB and removable disk drives that have capacities of approximately 1.0 GB with
storage capacity per disk of approximately 500 MB. The Company has the
technological capability to produce disks to fit standard form factors of
5 1/4-inches and below, although it currently produces only 3 1/2-inch disks.
 
                                       27
<PAGE>   28
 
MANUFACTURING AND QUALITY
 
     HMT believes that its internally developed proprietary and patented
manufacturing processes and state-of-the-art equipment, to which it has made
proprietary modifications, combined with its extensive expertise, currently
provide HMT with a technological advantage over competing independent thin film
disk manufacturers. HMT's expertise, processes and equipment also allow it to
develop new proprietary processes in response to customers' requirements for
improved product performance and to integrate new technologies into the
manufacturing process rapidly. The Company's production lines can be installed,
modified or expanded on a cost efficient basis. The use of a modular strategy
facilitates incremental capacity increases, efficient adaptation of
manufacturing equipment for new product processes and achievement of high volume
manufacturing capacity for new products on a timely basis.
 
     Manufacturing Process
 
     The Company's manufacturing process is briefly summarized as follows:
 
     Chamfer, Grind, Bake and Wash. The initial input to the production of a
thin film disk is an aluminum blank that can be procured from a number of
sources. To create specialized aluminum alloy substrates, HMT chamfers the inner
and outer edges of the blank, and bakes the chamfered blank to bring out surface
roughness. HMT then grinds the blank to achieve required gauge thickness and
flatness, remove surface defects, and improve surface finish. HMT then washes
the blank to remove particles. HMT currently produces these substrates through
in-house manufacturing, but may from time to time purchase a portion of its
requirements from independent vendors.
 
     Plate, Polish, Texture and Wash. Aluminum substrates are plated with
electroless Nickel-Phosphorus alloy, a non-magnetic layer critical to corrosion
resistance that strengthens the disk and improves durability. The Company
currently performs most of its nickel plating in-house. Disks are then polished
to produce a mirror smooth surface. Polishing enhances the nickel surface,
reducing its roughness, while maintaining the overall flatness of the disk. The
Company's texturizing process, a highly automated patented process, produces a
controlled roughness on the disk's surface to improve its stiction
characteristics. The final step in these front-end processes is washing to
present a clean disk surface. Subsequent processes occur in class 10 clean rooms
only.
 
     Sputter, Dip Lube and Kiss Buff. The sputter process uses equipment and a
process, similar to that used in silicon wafer fabrication, in which layers of
materials are deposited on the disk through a vacuum sputtering process. The
chrome and magnetic layers determine the magnetic properties of the disk. The
carbon layer is a protective overcoat. After sputtering, a microscopic layer of
lubrication is applied to the disk's surface to improve durability and reduce
surface friction. After lubrication, a surface finishing step is applied,
commonly referred to as kiss buff or tape burnish.
 
     Glide/Certify. In the test and certification process each finished disk is
electronically screened and certified as acceptable based on the customer's
specifications. A robotically controlled tester electronically tests for glide
performance. The tester then writes information onto the disk, reads it back and
erases it, simulating performance in the customer's disk drive. Each disk is
tested for parametrics, errors in the read/erase process and surface defects.
 
     The conversion of a specialized aluminum alloy substrate into a final
product requires three to five days.
 
                                       28
<PAGE>   29
 
THE THIN FILM DISK PRODUCTION PROCESS 


[Diagram--A flow draft summarizing the principal steps in the process flow and
the corresponding disk layers created during the thin film disk production
process.]


 
     Quality Assurance
 
     HMT has a dedicated quality assurance group. The Company believes that its
quality assurance program allows it to realize superior product yields and
consistently produce a quality product. Because a high quality product is
critical to achieving strong operating results and high customer satisfaction,
HMT's emphasis on this area will remain a top priority. The organization
consists of four separate groups:
 
     - Application Engineering. The Application Engineering group is responsible
       for reviewing customer requirements and specifications by conducting
       specification reviews and soliciting customer and internal manufacturing
       feedback. Other functions include correlating and evaluating the results
       of HMT and customer testing, generating standards and performing source
       audits.
 
                                       29
<PAGE>   30
 
     - Supplier Quality Engineering. Because quality assurance is a critical
       aspect of the Company's strategy, the emphasis on quality must extend to
       the supplier level. The Supplier Quality
       Engineering group is responsible for ensuring incoming product quality
       through auditing suppliers, reviewing process data, establishing internal
       specifications and creating quality procedures and practices. The group
       also establishes material specifications, supplier benchmarking and
       standards for qualification of the supplier base.
 
     - Reliability and Process Engineering. The Reliability and Process
       Engineering group is responsible for performing ongoing reliability
       testing, process improvement testing and new product development testing.
       Specific functions involve statistical process control analysis, gauge
       repeatability and reproducibility studies, equipment calibration, process
       qualification improvements and in-process quality audits.
 
     - Customer Support. The Customer Support group acts as liaison between the
       customer and the Company's manufacturing organization. All customer
       concerns and issues are handled through the group. Other responsibilities
       include corrective action requests, non-conforming material reviews,
       return material authorizations and document control.
 
     Manufacturing Facilities and Capacity
 
     The Company's manufacturing facilities, distribution center and
administrative offices are located in Fremont, California. The Company's Fremont
facility received ISO 9001 certification in May 1996. As of June 30, 1997, the
Company was operating 18 production scale sputtering lines seven days a week, 24
hours per day for production and development of products. A typical sputtering
line consists of one sputtering machine and associated equipment, such as
texturizers, lubricators, glide testers and certifiers. The Company recently
completed construction of a 124,000 square foot production facility at its
Fremont, California site, in which six of its sputtering lines are located. The
Company plans to install up to 10 additional production scale sputtering lines
in this facility. In addition, the Company completed an expansion of its
facility in Eugene, Oregon during fiscal 1997, where it produces aluminum
substrates and nickel-plated and polished substrates.
 
     Because the Company has been operating at close to full capacity, further
growth in the Company's net sales will depend on the continued successful
expansion by the Company of its manufacturing capacity. There can be no
assurance that the Company will be able to successfully increase capacity and
the failure to do so could have a material adverse effect of the Company's
business, operating results and financial condition.
 
TECHNOLOGY
 
     The Company believes that there are a number of factors that are key to
establishing and maintaining an advanced technology position. The Company is
optimizing non-precious metal alloys, based on a cobalt/chromium/tantalum alloy,
for future products with coercivities that can support foreseeable demand for
increased storage capacity using relatively inexpensive materials. The Company
also has extensive expertise in the deposition of these and other alloys onto
disks. The Company uses state-of-the-art static sputtering machines in the
development and production of disks. Static machines differ from in-line, pallet
machines used by some other disk manufacturers in a number of important
respects. Static sputtering machines process one stationary disk at a time,
allowing for greater control of alloy deposition and minimizing spatial and
temperature variation; use isolated process chambers, permitting the
manufacturer to control and optimize each process step separately; and do not
require a pallet, reducing the risk of contamination of the disk surface during
processing. The Company has further enhanced the performance of sputtering
equipment supplied by vendors through internally developed, proprietary and
patented modifications.
 
     The Company believes its unique tribology approach, which minimizes
detrimental interaction between the head and disk, is another area of strength.
The method involves balancing the inter-relationship between texturizing, carbon
overcoating and lubrication. The Company's patented graded
 
                                       30
<PAGE>   31
 
zone texture process allows the Company to produce a rougher texture at the
disk's inner diameter, while creating a smoother surface on the remainder of the
disk. This process provides increased protection where the head most often comes
into contact with the disk, while also minimizing the distance between the head
and the disk magnetics in other regions of the disk where data is stored and
read. A nitrogen-containing carbon overcoat offers superior wear resistance.
Application of the Company's in-house blended lubricant results in disks that
can withstand an extreme range of temperature and humidity conditions. These
additional layers must be thick enough to achieve the desired protection of the
disk and thin enough to minimize the distance between the head and the magnetic
layer of the disk. The Company believes that its application of these
technologies, with particular attention to the inter-relationship between the
technologies and their combined effect on disk performance, have enabled it to
develop competitive high-capacity disks.
 
     The Company also devotes considerable resources to developing disks for
drives utilizing new head technology. Head technology, traditionally based on
flying inductive heads that combine the read and write function within one head,
is undergoing significant evolution. Two important new technologies, proximity
recording and MR-heads, have emerged and over time are expected to replace
traditional inductive technology. The Company believes that proximity recording,
such as TRI-PAD or similar technology, which is an extension of current
inductive technology that, by design, allows a portion of the head to have
intermittent contact with the disk, will be an important technology for the next
several years. MR-head technology segregates the read and write function to
different elements of the head. By physically disconnecting the writing and
readback processes each can be individually tuned for optimized performance. The
Company expects that the superior performance offered by MR technology will make
it the dominant head technology of the future. In order to take advantage of the
technological potential of these new head technologies and enable the Company to
play a role in setting design specifications for the disk drive product, HMT
works directly with head manufacturers to develop compatible disks. The Company
has demonstrated the ability to produce disks for the new head formats through
the use of non-precious metal alloys, modified equipment and optimized
processes.
 
     The Company believes that its materials science expertise and ongoing
commitment to developing new technologies is critical to remaining competitive
and achieving desired operating results. The Company expects its research and
development effort to remain focused on alloy and process development, substrate
finish and texture, overcoat development, and compatibility with advanced
recording concepts. As it has done in the past, the Company intends to conduct
many of its development programs directly on active production lines,
facilitating transition to high volume commercial production and minimizing
development expense. During the fiscal years 1995, 1996 and 1997 and the three
months ended June 30, 1997, the Company incurred $3.1 million, $3.8 million,
$5.8 million and $1.9 million, respectively, of research and development
expenses. The Company believes that its future success depends on its ability to
continue to enhance its existing products and to develop new products.
 
CUSTOMERS, SALES AND SUPPORT
 
     The Company sells its products directly to independent OEM disk drive
manufacturers for incorporation primarily into hard disk drives which are
marketed under the manufacturers' own labels. The following table sets forth the
percentage of net sales attributable to sales to the Company's principal
customers in fiscal 1995, fiscal 1996, fiscal 1997 and the three months ended
June 30, 1997:
 
<TABLE>
<CAPTION>
                                                    FISCAL
                                            ----------------------     THREE MONTHS ENDED
                                            1995     1996     1997       JUNE 30, 1997
                                            ----     ----     ----     ------------------
        <S>                                 <C>      <C>      <C>      <C>
        Maxtor............................  73.7%    40.5%    40.7%            9.7%
        Samsung...........................   0.3      0.1     19.8            27.7
        Iomega............................    --      2.4     12.2            32.1
        Western Digital...................   5.9     35.8     11.9            18.7
        Micropolis........................  11.2      9.1      8.4             1.6
</TABLE>
 
                                       31
<PAGE>   32
 
     The Company's other customers during fiscal 1997 included Quantum and
Hewlett-Packard. Iomega utilizes the Company's disks in its removable media hard
disk drives. Due to cessation of its high-end manufacturing operations,
Quantum's high-end products are now being manufactured by Matsushita Kotobuki
Electronics Industries ("MKE"), and the Company is currently shipping products
to MKE. Due to the rapid and frequent development of new disk drive products, it
is common in the industry for the relative mix of customers and products to
change rapidly, even from quarter to quarter.
 
     The Company has generally sold its products to customers pursuant to
purchase orders and similar short-term arrangements. In June 1996, the Company
entered into a long-term supply agreement with Maxtor covering the supply of
disks to Maxtor through June 2001. While this agreement contemplates a
significant increase in the purchases of disks by Maxtor from current levels, it
is subject to a number of conditions and qualifications; and there can be no
assurance that Maxtor will in fact remain a significant customer during the term
of the agreement.
 
     The Company believes that close technical collaboration with its customers
and their other suppliers during the design phase of new disk drives facilitates
integration of the Company's products into new disk drives, improves the
Company's ability to rapidly reach cost effective high volume manufacturing and
enhances the likelihood that the Company will become a primary supplier of thin
film disks for new disk drive products. However, the design-in process is
ongoing and recurs frequently, and the Company must compete for participation in
each new product program, even those of existing customers.
 
     The Company's customer sales and service efforts are an integral part of
maintaining strong customer relations. The sales and service organization
processes requests from customers concerning product needs and acts to mobilize
the Company's resources to fulfill customer requests.
 
     Although the Company has broadened its customer base, there are a
relatively small number of disk drive manufacturers, and the Company expects
that its dependence on a few customers will continue in the future.
Additionally, there is the possibility that one or more of the Company's
customers could develop or expand their ability to produce thin film disks
internally and, as a result, could reduce the level of purchases or cease
purchasing from the Company or could sell thin film disks in competition with
the Company. There has also been a trend toward consolidation in the disk drive
industry that the Company expects to continue. If any of the Company's customers
or competitors were to combine and rationalize suppliers and competitive product
lines, the Company's business, results of operations and financial condition
could be materially adversely affected.
 
BACKLOG
 
     The Company's sales are generally made pursuant to purchase orders that are
subject to cancellation, modification, quantity reductions or rescheduling
without significant penalties. Customers typically provide the Company with
forecasts of expected requirements for the next three to six months and submit
purchase orders 60 to 90 days in advance of shipment dates. Because these
purchase orders may be modified or rescheduled by customers on short notice and
without penalty, the Company does not believe that its backlog as of any
particular date should be considered indicative of sales for any future period.
 
COMPETITION
 
     Competitors in the thin film disk industry fall into three groups: U.S.
non-captive manufacturers, Japan-based manufacturers and U.S. captive
manufacturers. Historically each of these groups has supplied approximately
one-third of the worldwide thin film disk unit output. The Company's primary
U.S. non-captive competitors are Akashic, Komag and StorMedia. Japan-based
competitors include Fuji, Mitsubishi, Showa Denko and Hoya. Certain of these
companies have significantly greater financial, technical and marketing
resources than the Company. In addition, U.S. captive manufacturers, which
include certain computer manufacturers, as well as disk drive manufacturers such
as Seagate, an affiliate of Maxtor and Western Digital, manufacture disks or
plan to manufacture disks for their internal use as part of their vertical
integration programs. These companies could increase their internal production
and
 
                                       32
<PAGE>   33
 
reduce or cease purchasing from independent disk suppliers such as the Company.
In the event of an oversupply of disks, these customers are likely to utilize
their internal capacity prior to purchasing disks from independent manufacturers
such as the Company. Moreover, while captive manufacturers have, to date, sold
only nominal quantities of thin film disks in the open market, there can be no
assurance that such companies will not in the future do so in direct competition
with the Company. Furthermore, there can be no assurance that other current and
potential customers will not acquire or develop capacity to produce thin film
disks for internal use, or that disk manufacturing capacity will not exceed
demand. Any such changes could have a material adverse effect on the Company's
business, operating results and financial condition. Announcement or
implementation of any of the following by the Company's competitors could have a
material adverse effect on the Company's business, operating results and
financial condition: changes in pricing, product introductions, increases in
production capacity, changes in product mix and technological innovation.
 
     The market for thin film disk products is highly competitive, and the
Company expects competition to increase in the future. The Company believes that
the principal competitive factors affecting this market include performance,
quality, delivery capability and price. The Company believes that its products
compete favorably in the high-end segment of the market that it serves,
especially with respect to performance and quality. The thin film disk industry
is characterized by short product life cycles, ranging from nine to twelve
months. As a result, the Company must continually anticipate, and adapt its
products to meet, demand for increased storage capacity. There can be no
assurance that in the future the Company will be able to manufacture products on
a timely basis with the quality and features necessary in order to remain
competitive. In addition, the development of technologically innovative products
requires substantial investments in research and development.
 
     The thin film disk industry is characterized by intense price competition.
While the Company believes that consumers in the high-end, high-capacity segment
of the market in which the Company operates are less sensitive to price, the
Company has experienced pricing pressures in the past, and there can be no
assurance that the Company will not experience increased price competition in
the future. Pricing pressure has included, and may in the future include,
demands for discounts, long-term supply commitments and extended payment terms.
Any increase in price competition could have a material adverse effect on the
Company's business, operating results and financial condition. The Company and
certain of its competitors are currently engaged in substantial efforts to
increase disk manufacturing capacity. To the extent that these efforts result in
industry capacity in excess of levels of demand, the Company could experience
increased levels of competition, which could have a material adverse effect on
the Company's business, operating results and financial condition.
 
EMPLOYEES
 
     As of June 30, 1997, the Company had 1,624 full-time employees, with 1,430
in manufacturing, 57 in research and development, 70 in quality assurance and 67
in administration and marketing. The Company believes it generally has good
relations with its employees. None of the Company's employees are represented by
a labor union, and the Company has never experienced a work stoppage.
 
                                       33
<PAGE>   34
 
                                    GLOSSARY
 
AREAL DENSITY: The number of bits of data stored per unit of area.
 
BIT: The basic unit of storage of information in a computer system. Bits are
represented by the presence or absence of changes in orientation of the magnetic
domains along a track on the storage media.
 
BYTE: Equal to eight bits.
 
CHAMFER: The process of cutting the sharp edges from the inner and outer edges
of an aluminum blank.
 
COERCIVITY: A measure of the magnetic strength of the disk which is expressed in
Oersteds.
 
DISK SPUTTERING LINES: A sputtering system and related equipment such as
plating, polishing, texturizing, lubrication and test equipment as well as
related handling equipment.
 
GIGABYTE (GB): Equal to one billion bytes or one thousand megabytes.
 
GLIDE HEIGHT: The height at which the head can fly over the disk without hitting
anything. The glide height is dependent on the smoothness and flatness of the
disk.
 
HEAD OR DISK DRIVE HEAD: Small magnetic transducer that flies above the surface
of the disk and performs the functions of reading and writing data on the disk.
 
INDUCTIVE WRITING AND READING HEADS: Refers to heads which use a single element
for both the writing and reading process. In the writing process, a current
induces an alternating magnetic field at the magnetic tips of the head. In the
reading process, the same element senses the magnetic field from the written
bits of data and thereby induces an electrical current.
 
MAGNETO-RESISTIVE (MR) HEADS: Recording heads that use an inductive thin film
element to write data on to the media and read the data with a separate
magneto-resistive element. The use of a separate but much more sensitive read
element permits data to be recorded and, subsequently, read at much higher track
densities than inductive thin film head technology.
 
MEGABYTE (MB): Equal to one million bytes.
 
MICROINCH: One millionth of an inch.
 
MICRON: One millionth of a meter.
 
NETWORK SERVER OR SERVER: A computer generally configured for the support of
concurrent multi-user applications. The server is generally a storage repository
of software and data.
 
OERSTED (OE): A unit of magnetic strength.
 
PROXIMITY RECORDING: Extension of traditional inductive writing/reading
technology which improves performance by bringing transducer into direct contact
with disk.
 
SPUTTERING: A complex vacuum deposition process used to deposit multiple thin
film layers on a disk.
 
STICTION: The static friction that occurs when two smooth surfaces come into
contact. A common example is a coin on a wet counter.
 
SUBSTRATES: The disk material (typically aluminum) onto which the thin layers of
material are sputtered.
 
THIN FILMS: For magnetic disks, films with thickness measured in microinches
(millionths of an inch).
 
THIN FILM DISK OR DISK: A disk incorporating a thin magnetic film capable of
storing information in the form of magnetic patterns written and detected by a
separate magnetic head within a disk drive.
 
TRIBOLOGY: Refers to the mechanical interaction between the recording head and
the disk.
 
YIELD: A measure of manufacturing efficiency; the percent of acceptable product
obtained from a specific manufacturing process(es).
 
                                       34
<PAGE>   35
 
                              SELLING STOCKHOLDERS
 
     The following table sets forth certain information regarding the beneficial
ownership of the Company's Common Stock as of June 30, 1997 by the Selling
Stockholders. The shares being offered by each Selling Stockholder shall be
allocated 85% to the U.S. Offering and 15% to the International Offering
(subject to rounding adjustments). The Underwriters' over-allotment options
shall be allocated among the Company and the Selling Stockholders based on their
pro rata portion of the shares to be sold in the Offerings. Percentage of
beneficial ownership is based on 41,228,793 shares of Common Stock outstanding
as of June 30, 1997 and the number of shares owned as of such date.
 
<TABLE>
<CAPTION>
                                       SHARES BENEFICIALLY                    SHARES BENEFICIALLY
                                       OWNED PRIOR TO THE                       OWNED AFTER THE
                                          OFFERINGS(1)           SHARES         OFFERINGS(1)(2)
                                      ---------------------      BEING       ---------------------
                                        NUMBER      PERCENT    OFFERED(3)      NUMBER      PERCENT
                                      ----------    -------    ----------    ----------    -------
<S>                                   <C>           <C>        <C>           <C>           <C>
SELLING STOCKHOLDERS
Summit Ventures III, L.P.(4).........  6,778,429      16.4%     2,440,359     4,338,070      10.5%
Summit Ventures IV, L.P.(4)..........  6,778,429      16.4      2,440,359     4,338,070      10.5
Hitachi Metals, Ltd..................  5,146,744      12.5      1,648,489     3,498,255       8.3
Ronald L. Schauer(5).................  3,146,000       7.6      1,100,000     2,046,000       4.8
Summit Subordinated Debt Fund,
  L.P.(4)............................    909,881       2.2        327,518       582,363       1.4
Michael A. Russak(6).................    840,754       2.0        275,000       565,754       1.3
George J. Hall(7)....................    681,215       1.7        240,000       441,215       1.0
Ronald J. Buschur(8).................    889,986       2.2        235,000       654,986       1.6
Peter S. Norris(9)...................    560,769       1.4        100,000       460,769       1.1
Summit Investors II, L.P.(4).........    253,952         *         91,515       162,437         *
Crossroads SF Limited Partnership....    140,573         *         30,003       110,570         *
Crossroads Capital II Limited
  Partnership........................    106,890         *         28,535        78,355         *
Joseph E. Haefele(10)................    200,374         *         20,000       180,374         *
Bruce C. Edwards(11).................     46,500         *         12,000        34,500         *
Crossroads DPT Limited Partnership...     52,537         *         11,222        41,315         *
</TABLE>
 
- ---------------
 
  *  Represents beneficial ownership of less than 1%.
 
 (1) Beneficial ownership is determined in accordance with the rules of the
     Securities and Exchange Commission and generally includes voting or
     investment power with respect to securities. Except as indicated by
     footnote, and subject to community property laws where applicable, the
     persons named in the table above have sole voting and investment power with
     respect to all shares of Common Stock shown as beneficially owned by them.
 
 (2) Adjusted to reflect the sale of 1,000,000 shares by the Company in the
     Offerings.
 
 (3) Assumes no exercise of the Underwriters' over-allotment options. None of
     the shares being offered are subject to a repurchase right in favor of the
     Company.
 
 (4) Walter G. Kortschak, a director of the Company, is a general partner of the
     following entities: (i) Stamps, Woodsum & Co. III, the general partner of
     Summit Partners III, L.P. and Summit Partners SD, L.P., which are the
     general partners of Summit Ventures III, L.P. and Summit Subordinated Debt
     Fund, L.P., respectively; (ii) Stamps, Woodsum & Co. IV, the general
     partner of Summit Partners IV, L.P., which is the general partner of Summit
     Ventures IV, L.P.; and (iii) Summit Investors II, L.P.
 
 (5) Consists of 3,146,000 shares held by Ronald L. Schauer and Marlys A.
     Schauer, as co-trustees of the Schauer Living Trust u/a/d 3/11/96 ("Schauer
     Living Trust"). All of the shares being offered hereby are held by the
     Schauer Living Trust. Includes 1,079,736 shares that are subject to a right
     of repurchase in favor of the Company that expires ratably through November
     1999 and 188,360 shares that are subject to a right of repurchase in favor
     of the Company that expires upon the earlier of the Company achieving
     certain performance goals or ratably beginning December 2000 through
     December 2004. Mr. Schauer is President, Chief Executive Officer and
     Chairman of the Board of the Company.
 
                                       35
<PAGE>   36
 
 (6) Includes 818,899 shares held by Michael A. Russak and Bonnie-Anne Russak,
     as co-trustees of the Russak Living Trust u/a/d 5/31/96 ("Russak Living
     Trust"). All of the shares being offered hereby are held by the Russak
     Living Trust. Includes 21,000 shares held by the Mary Lynn Russak 1996
     Irrevocable Trust ("Mary Lynn Russak Trust") and 635 shares held by Dr.
     Russak's spouse. Mary Lynn Russak, the beneficiary of the Mary Lynn Russak
     Trust, is a daughter of Dr. Russak. Dr. Russak disclaims beneficial
     ownership of the shares held in the Mary Lynn Russak Trust. Includes
     297,794 shares that are subject to a right of repurchase in favor of the
     Company that expires ratably through November 1999 and 51,949 shares that
     are subject to a right of repurchase that expires upon the earlier of the
     Company achieving certain performance goals or ratably beginning December
     2000 through December 2004. Dr. Russak is Vice President, Research and
     Development of the Company.
 
 (7) Consists of 653,715 shares held by George J. Hall and Dianna Lynn Hall, as
     co-trustees of the George J. Hall Family Trust u/a/d 11/26/92, amended
     5/8/96 ("Hall Family Trust") and 27,500 shares held by the Anne T. Hall
     Foundation ("Hall Foundation"). All of the shares being offered hereby are
     held by the Hall Family Trust. Mr. Hall disclaims beneficial ownership of
     the shares held by him as trustee of the Hall Foundation. Includes 297,794
     shares that are subject to a right of repurchase in favor of the Company
     that expires ratably through November 1999 and 51,949 shares that are
     subject to a right of repurchase that expires upon the earlier of the
     Company achieving certain performance goals or ratably beginning December
     2000 through December 2004. Mr. Hall is Vice President, Operations of the
     Company.
 
 (8) Includes 851,546 shares held by Ronald J. Buschur and Lisa A. Buschur, as
     co-trustees of the Buschur Living Trust u/a/d 3/11/96 ("Buschur Living
     Trust"), 19,220 shares held by the Ryan Buschur 1996 Irrevocable Trust
     u/a/d 2/9/96 ("Ryan Buschur Trust") and 19,220 shares held by the Lynsey
     Buschur 1996 Irrevocable Trust u/a/d 2/6/96 ("Lynsey Buschur Trust").
     Subsequent to June 30, 1997, Mr. Buschur transferred 215,760 shares of the
     Company's Common Stock to the Buschur Living Trust. All of the shares being
     offered hereby are held by the Buschur Living Trust. Ryan Buschur, the
     beneficiary of the Ryan Buschur Trust, and Lynsey Buschur, the beneficiary
     of the Lynsey Buschur Trust, are the children of Mr. Buschur. Mr. Buschur
     disclaims beneficial ownership of the shares held by him as trustee of the
     Ryan Buschur Trust and the Lynsey Buschur Trust. Includes 297,794 shares
     that are subject to a right of repurchase in favor of the Company that
     expires ratably through November 1999 and 51,949 shares that are subject to
     a right of repurchase in favor of the Company that expires upon the earlier
     of the Company achieving certain performance goals or ratably beginning
     December 2000 through December 2004. Mr. Buschur is Vice President, Quality
     Assurance of the Company.
 
 (9) Includes 240,857 shares that are subject to a right of repurchase in favor
     of the Company that expires ratably through November 1999 and 29,214 shares
     that are subject to a right of repurchase in favor of the Company that
     expires upon the earlier of the Company achieving certain performance goals
     or ratably beginning December 2000 through December 2004. Mr. Norris is
     Vice President, Finance, Chief Financial Officer, Treasurer and Assistant
     Secretary of the Company.
 
(10) Includes 55,813 shares that are subject to a right of repurchase in favor
     of the Company that expires ratably through November 1999 and 9,718 shares
     that are subject to a right of repurchase in favor of the Company that
     expires upon the earlier of the Company achieving certain performance goals
     or ratably beginning December 2000 through December 2004. Includes 19,740
     shares held by Mr. Haefele's spouse. Mr. Haefele was promoted to Vice
     President of Operations, Fremont of the Company in July 1997.
 
(11) Includes 13,563 shares held by Bruce C. Edwards and Susan E. Edwards, as
     co-trustees of the Bruce C. Edwards and Susan E. Edwards Living Trust u/a/d
     6/26/91 ("Edwards Living Trust"). Subsequent to June 30, 1997, Mr. Edwards
     transferred 2,906 shares of the Company's Common Stock to the Edwards
     Living Trust. All of the shares being offered hereby are held by the
     Edwards Living Trust. Includes 30,031 shares that are subject to a right of
     repurchase in favor of the Company that expires ratably beginning January
     1997 through January 2000. Mr. Edwards is a director of the Company.
 
                                       36
<PAGE>   37
 
                          DESCRIPTION OF CAPITAL STOCK
 
     The authorized capital stock of the Company consists of 100,000,000 shares
of Common Stock, $0.001 par value, and 9,100,000 shares of Preferred Stock,
$0.001 par value.
 
COMMON STOCK
 
     As of August 13, 1997, there were 41,334,565 shares of Common Stock
outstanding held of record by approximately 226 stockholders. The holders of
Common Stock are entitled to one vote per share on all matters to be voted on by
the stockholders. Subject to preferences that may be applicable to outstanding
shares of Preferred Stock, if any, the holders of Common Stock are entitled to
receive ratably such dividends as may be declared from time to time by the Board
of Directors out of funds legally available therefor. In the event of the
liquidation, dissolution or winding up of the Company, the holders of Common
Stock are entitled to share ratably in all assets remaining after payment of
liabilities, subject to prior liquidation rights of Preferred Stock, if any,
then outstanding. The Common Stock has no preemptive rights or other
subscription rights. There are no redemption or sinking funds provisions
applicable to the Common Stock. All outstanding shares of Common Stock are fully
paid and non-assessable.
 
WARRANTS
 
     In connection with the Leveraged Recapitalization, pursuant to a warrant
purchase agreement dated November 30, 1995, the Company issued to certain senior
lenders (the "Warrantholders") warrants to purchase an aggregate of 701,344
shares of Common Stock at a price of $0.0003 per share. The warrants terminate
on November 30, 2002. Upon any reorganization or reclassification, consolidation
or merger or any sale or other transfer of substantially all of its assets the
warrants may be repurchased by the Company with the consent of the
Warrantholders. In the event the Warrantholders do not consent to such
repurchase, the warrants must be exercised prior to the consummation of such
transaction and will be converted into the right to receive a comparable number
of securities or property of the surviving corporation. The warrants include a
net exercise provision, and the Warrantholders have the right to cause the
Company to repurchase the warrants and any shares issued upon exercise thereof
under certain circumstances. Upon payment of the outstanding balance of the
senior bank term loan in March 1996, the Company redeemed warrants for 280,550
shares of Common Stock at the Warrantholders' cost ($0.02), leaving a balance of
420,794 shares subject to the remaining warrants. In addition, the
Warrantholders have certain registration rights with respect to the shares of
Common Stock issuable upon exercise of such warrants. In June 1997, one of the
Warrantholders exercised its warrant and sold all of the underlying shares of
Common Stock. As of June 30, 1997, a warrant to purchase an aggregate of 210,397
shares of Common Stock remained outstanding.
 
REGISTRATION RIGHTS
 
     Pursuant to an agreement between the Company and the holders (or their
permitted transferees) of approximately 29,656,057 shares of Common Stock
("Holders"), the Holders are entitled to certain rights with respect to the
registration of such shares under the Securities Act of 1933, as amended (the
"Securities Act"). If the Company proposes to register its Common Stock, subject
to certain exceptions, under the Securities Act, the Holders are entitled to
notice of the registration and are entitled to include, at the Company's
expense, such shares therein, provided that the managing underwriters have the
right to limit the number of such shares included in the registration. In
addition, certain of the Holders may require the Company at its expense on no
more than two occasions within six months to file a registration statement under
the Securities Act with respect to their shares of Common Stock. Such rights
became exercisable in September 1996. Further, certain Holders may require the
Company at its expense to register their shares on Form S-3 when such form
becomes available to the Company, subject to certain conditions and limitations.
Such right expires in March 2001.
 
     In connection with the issuance of the Convertible Notes, pursuant to the
Registration Agreement for the benefit the holders of the Convertible Notes and
the Common Stock issuable upon conversion
 
                                       37
<PAGE>   38
 
thereof, the Company registered the resale of such securities pursuant to a
shelf registration statement. The other registration rights described above do
not give any other holders of securities of the Company (other than the
Warrantholders) the right to participate in any such registration statement
because such registration rights are inapplicable by their terms or, to the
extent otherwise applicable, have been waived.
 
DELAWARE ANTI-TAKEOVER LAW AND CERTAIN CHARTER PROVISIONS
 
     The Company is governed by the provisions of Section 203 of the Delaware
Law. In general, Section 203 prohibits a public Delaware corporation from
engaging in a "business combination" with an "interested stockholder" for a
period of three years after the date of the transaction in which the person
became an interested stockholder, unless the business combination is approved in
a prescribed manner. A "business combination" includes mergers, asset sales and
other transactions resulting in a financial benefit to the stockholder. An
"interested stockholder" is a person who, together with affiliates and
associates, owns (or within three years, did own) 15% or more of a corporation's
voting stock. The statute could have the effect of delaying, deferring or
preventing a change in control of the Company.
 
     The Company's Certificate of Incorporation and Bylaws also require that any
action required or permitted to be taken by stockholders of the Company must be
effected at a duly called annual or special meeting of the stockholders and may
not be effected by a consent in writing. In addition, special meetings of the
stockholders of the Company may be called only by the Board of Directors, the
Chairman of the Board, the Chief Executive Officer of the Company or by any
person or persons holding shares representing at least 20% of the outstanding
capital stock. The Company's Certificate of Incorporation also specifies that
the authorized number of directors may be changed only by resolution of the
Board of Directors. These provisions may have the effect of deterring hostile
takeovers or delaying changes in control or management of the Company.
 
TRANSFER AGENT AND REGISTRAR
 
     The transfer agent and registrar for the Company's Common Stock is Boston
EquiServe Limited Partnership. Its telephone number is (617) 575-2000.
 
                                       38
<PAGE>   39
 
                                  UNDERWRITING
 
     Subject to the terms and conditions set forth in an underwriting agreement
(the "U.S. Underwriting Agreement") among the Company, the Selling Stockholders
and each of the underwriters named below (the "U.S. Underwriters"), for whom
Salomon Brothers Inc, Alex. Brown & Sons Incorporated, Hambrecht & Quist LLC and
Robertson, Stephens & Company LLC, are acting as representatives (the "U.S.
Representatives"), the Company and the Selling Stockholders have agreed to sell
to each of the U.S. Underwriters and each of the U.S. Underwriters has severally
agreed to purchase from the Company and the Selling Stockholders the aggregate
number of Shares set forth opposite its name in the table below.
 
<TABLE>
<CAPTION>
                                                                              NUMBER OF
                               U.S. UNDERWRITERS                                SHARES
    ------------------------------------------------------------------------  ----------
    <S>                                                                       <C>
    Salomon Brothers Inc....................................................   2,000,000
    Alex. Brown & Sons Incorporated.........................................   2,000,000
    Hambrecht & Quist LLC...................................................   2,000,000
    Robertson, Stephens & Company LLC.......................................   2,000,000
    Crowell, Weedon & Co....................................................     125,000
    Needham & Company, Inc..................................................     125,000
    Sands Brothers & Co., Ltd...............................................     125,000
    Sutro & Co. Incorporated................................................     125,000
                                                                              ----------
              Total.........................................................   8,500,000
                                                                              ==========
</TABLE>
 
     The U.S. Underwriting Agreement provides that the obligations of the U.S.
Underwriters to purchase the Shares listed above are subject to certain
conditions set forth therein. The U.S. Underwriters are committed to purchase
all of the Shares offered by this Prospectus (other than those covered by the
over-allotment options described below), if any are purchased. In the event of
default by any U.S. Underwriter, the U.S. Underwriting Agreement provides that,
in certain circumstances, the purchase commitments of the non-defaulting U.S.
Underwriters may be increased or the U.S. Underwriting Agreement may be
terminated.
 
     The U.S. Representatives have advised the Company and the Selling
Stockholders that the U.S. Underwriters propose initially to offer such Shares
to the public at the initial public offering price set forth on the cover page
of this Prospectus, and to certain dealers at such price less a discount not in
excess of $0.36 per share. The U.S. Underwriters may allow, and such dealers may
reallow, a discount not in excess of $0.10 per share on sales to certain other
dealers. After the Offerings, the public offering price and such discounts may
be changed.
 
     The Company and the Selling Stockholders also have entered into an
underwriting agreement (the "International Underwriting Agreement") with the
International Underwriters named therein, for whom Salomon Brothers
International Limited, Alex. Brown & Sons International, Hambrecht & Quist LLC
and Robertson, Stephens & Company LLC, are acting as representatives (the
"International Representatives"), providing for the concurrent offer and sale of
1,725,000 of the Shares outside the U.S. and Canada (including up to 225,000
shares subject to exercise of an underwriters' over-allotment option by the
International Underwriters) (the "International Securities").
 
     The closing with respect to the sale of the Shares pursuant to the U.S.
Underwriting Agreement is a condition to the closing with respect to the sale of
the Shares pursuant to the International Underwriting Agreement, and the closing
with respect to the sale of Shares pursuant to the International Underwriting
Agreement is a condition to the closing with respect to the sale of the Shares
pursuant to the U.S. Underwriting Agreement. The initial public offering price
and underwriting discounts per Share for the U.S. Offering and the International
Offering will be identical.
 
                                       39
<PAGE>   40
 
     Each U.S. Underwriter has severally agreed that, as part of the
distribution of the 8,500,000 Shares by the U.S. Underwriters, (i) it is not
purchasing any Shares for the account of anyone other than a United States or
Canadian Person, (ii) it has not offered or sold, and will not offer or sell,
directly or indirectly, any Shares or distribute any Prospectus relating to the
U.S. Offering to any person outside of the United States or Canada, or to anyone
other than a United States or Canadian Person and (iii) any dealer to whom it
may sell any Shares will represent that it is not purchasing for the account of
anyone other than a United States or Canadian Person and agree that it will not
offer or resell, directly or indirectly, any Shares outside of the United States
or Canada, or to anyone other than a United States or Canadian Person or to any
other dealer who does not so represent and agree.
 
     Each International Underwriter has severally agreed that, as part of the
distribution of the 1,500,000 Shares by the International Underwriters, (i) it
is not purchasing any Shares for the account of any United States or Canadian
Person, (ii) it has not offered or sold, and will not offer or sell, directly or
indirectly, any Shares or distribute this Prospectus to any person in the United
States or Canada, or to any United States or Canadian Person and (iii) any
dealer to whom it may sell any Shares will represent that it is not purchasing
for the account of any United States or Canadian Person and agree that it will
not offer or resell, directly or indirectly, any Shares in the United States or
Canada, or to any United States or Canadian Person or to any other dealer who
does not so represent and agree.
 
     The foregoing limitations do not apply to stabilization transactions or to
certain other transactions specified in the Agreement Between U.S. Underwriters
and International Underwriters. "United States or Canadian Person" means any
person who is a national or resident of the United States or Canada, any
corporation, partnership or other entity created or organized in or under the
laws of the United States or Canada or of any political subdivision thereof, and
any estate or trust the income of which is subject to United States or Canadian
federal income taxation, regardless of its source (other than a foreign branch
of such entity) and includes any United States or Canadian branch of a person
other than a United States or Canadian Person.
 
     Each U.S. Underwriter that will offer or sell shares of Common Stock in
Canada as part of the distribution has severally agreed that such offers and
sales will be made only pursuant to an exemption from the prospectus
requirements in each jurisdiction in Canada in which such offers and sales are
made.
 
     Pursuant to the Agreement Between U.S. Underwriters and International
Underwriters, sales may be made between the U.S. Underwriters and the
International Underwriters of such number of Shares as may be mutually agreed.
The price of any Shares so sold shall be the public offering price set forth on
the cover page of this Prospectus, less an amount not greater than the
concession to securities dealers set forth above. To the extent that there are
sales between the International Underwriters and the U.S. Underwriters pursuant
to the Agreement Between U.S. Underwriters and International Underwriters, the
number of Shares initially available for sale by the U.S. Underwriters or by the
International Underwriters may be more or less than the amount specified on the
cover page of this Prospectus.
 
     Each International Underwriter has severally represented and agreed that
(i) it has not offered or sold and, prior to the expiration of six months from
the closing of the International Offering, will not offer or sell any
International Securities in the United Kingdom other than to persons whose
ordinary activities involve them in acquiring, holding, managing or disposing of
investments (whether as principal or agent) for the purposes of their businesses
or otherwise in circumstances which have not resulted in and will not result in
an offer to the public within the meaning of the Public Offers of Securities
Regulations 1995; (ii) it has complied and will comply with all applicable
provisions of the Financial Services Act of 1986 with respect to anything done
by it in relation to the International Securities in, from or otherwise
involving the United Kingdom; and (iii) it has only issued or passed on and will
only issue or pass on in the United Kingdom any document received by it in
connection with the issue of the International Securities to a person who is of
a kind described in Article 11(3) of the Financial Services Act 1986 (Investment
Advertisements) (Exemptions) Order 1996 or is a person to whom such document may
otherwise lawfully be issued or passed on.
 
                                       40
<PAGE>   41
 
     The Company and the Selling Stockholders have granted to the U.S.
Underwriters and the International Underwriters options to purchase up to an
additional 1,275,000 and 225,000 Shares, respectively, at the price to public
less the underwriting discount set forth on the cover page of this Prospectus,
solely to cover over-allotments, if any. Such options may be exercised at any
time up to 30 days after the date of this Prospectus. To the extent such options
are exercised, each of the U.S. Underwriters and the International Underwriters
will become obligated, subject to certain conditions, to purchase approximately
the same percentage of such additional shares of Common Stock as the percentage
it was obligated to purchase pursuant to the U.S. Underwriting Agreement or the
International Underwriting Agreement, as applicable.
 
     The Company, the Selling Stockholders and all of the executive officers and
directors of the Company have agreed not to offer, sell, contract to sell,
pledge or otherwise dispose of, or file a registration statement with the
Commission in respect of, or establish or increase a put equivalent position or
liquidate or decrease a call equivalent position within the meaning of Section
16 of the Exchange Act with respect to, any shares of capital stock of the
Company or any securities convertible into or exercisable or exchangeable for
such capital stock (except for the shares offered hereby), or publicly announce
an intention to effect any such transaction for a period of 90 days after the
date of this Prospectus without the prior written consent of Salomon Brothers
Inc, subject to certain limited exceptions. Salomon Brothers Inc currently does
not intend to release any securities subject to such lock-up agreements, but
may, in its sole discretion and at any time without notice, release all or any
portion of the securities subject to such lock-up agreements.
 
     The U.S. Underwriting Agreement and the International Underwriting
Agreement provide that the Company and the Selling Stockholders will indemnify
the several U.S. Underwriters and International Underwriters against certain
liabilities under the Securities Act, or contribute to payments the U.S.
Underwriters and the International Underwriters may be required to make in
respect thereof.
 
     Certain of the Underwriters and their affiliates have been engaged from
time to time, and may in the future be engaged, to perform investment banking
and other advisory-related services to the Company and its affiliates, including
certain of the Selling Stockholders, in the ordinary course of business. In
connection with rendering such services in the past, such Underwriters and
affiliates have received customary compensation, including reimbursement of
related expenses.
 
     In connection with the offering, the Underwriters may engage in
transactions that stabilize, maintain or otherwise affect the price of the
Common Stock. Specifically, the Underwriters may over-allot the offering,
creating a syndicate short position. In addition, the Underwriters may bid for
and purchase shares of Common Stock in the open market to cover syndicate short
positions or to stabilize the price of the Common Stock. Finally, the
underwriting syndicate may reclaim selling concessions from syndicate members in
the offering, if the syndicate repurchases previously distributed Common Stock
in syndicate covering transactions, in stabilization transactions or otherwise.
Any of these activities may stabilize or maintain the market price of the Common
Stock above independent market levels. The Underwriters are not required to
engage in these activities, and may end any of these activities at any time.
 
                                 LEGAL MATTERS
 
     The validity of the shares of Common Stock offered hereby will be passed
upon for the Company and the Selling Stockholders by Cooley Godward LLP, Palo
Alto, California. Certain legal matters in connection with this offering will be
passed upon for the Underwriters by Wilson Sonsini Goodrich & Rosati,
Professional Corporation, Palo Alto, California. As of the date of this
Prospectus, Cooley Godward LLP beneficially owns 93,000 shares of Common Stock,
of which 60,062 shares are subject to the Company's right of repurchase. In
addition, James C. Kitch, a partner of Cooley Godward LLP, is the Secretary of
the Company.
 
                                       41
<PAGE>   42
 
                                    EXPERTS
 
     The consolidated financial statements and financial statement schedule of
the Company included in the Company's Annual Report on Form 10-K for the fiscal
year ended March 31, 1997, incorporated by reference in this Prospectus, have
been audited by Coopers & Lybrand L.L.P., independent accountants, as set forth
in their report dated April 22, 1997, and are incorporated by reference herein
in reliance upon the report of such firm, which report is given upon their
authority as experts in accounting and auditing.
 
                             ADDITIONAL INFORMATION
 
     The Company is subject to the informational requirements of the Exchange
Act, and, in accordance therewith, files reports, proxy statements and other
information with the Commission. Such reports, proxy statements and other
information can be inspected and copied at the public reference facilities
maintained by the Commission at Room 1024, 450 Fifth Street, N.W., Washington,
D.C. 20549, and at the Commission's Regional Offices located at Seven World
Trade Center, 13th Floor, New York, New York 10048 and at Citicorp Center, 500
West Madison Street, Suite 1400, Chicago, Illinois 60661. The Commission
maintains a Web site that contains reports, proxy and information statements and
other information regarding registrants that file electronically with the
Commission. The address of such Web site is http://www.sec.gov. The Company's
Common Stock is listed on the Nasdaq National Market, 1735 K Street, N.W.,
Washington, D.C. 20006, and reports, proxy statements and other information
concerning the Company can be inspected at said office.
 
     A registration statement on Form S-3 with respect to the Common Stock
offered hereby (together with all amendments and exhibits, the "Registration
Statement") has been filed with the Commission under the Act. This Prospectus
does not contain all of the information contained in such Registration Statement
and the exhibits and schedules thereto, certain portions of which have been
omitted pursuant to the rules and regulations of the Commission. For further
information with respect to the Company and the Common Stock offered hereby,
reference is made to the Registration Statement and the exhibits and schedules
thereto. Statements contained in this Prospectus regarding the contents of any
contract or any other documents are not necessarily complete and, in each
instance, reference is hereby made to the copy of such contract or document
filed as an exhibit to the Registration Statement. The Registration Statement,
including exhibits thereto, may be inspected without charge at the Securities
and Exchange Commission's principal office in Washington, D.C., and copies of
all or any part thereof may be obtained from the Public Reference Section,
Securities and Exchange Commission, Washington, D.C. 20549, upon payment of the
prescribed fees.
 
                                       42
<PAGE>   43
 
NO DEALER, SALESPERSON OR OTHER PERSON HAS BEEN AUTHORIZED TO GIVE ANY
INFORMATION OR TO MAKE ANY REPRESENTATIONS OTHER THAN THOSE CONTAINED IN THIS
PROSPECTUS IN CONNECTION WITH THE OFFER MADE BY THIS PROSPECTUS AND, IF GIVEN OR
MADE, SUCH INFORMATION OR REPRESENTATIONS MUST NOT BE RELIED UPON AS HAVING BEEN
AUTHORIZED BY THE COMPANY, THE SELLING STOCKHOLDERS OR ANY OF THE UNDERWRITERS.
NEITHER THE DELIVERY OF THIS PROSPECTUS NOR ANY SALE MADE HEREUNDER SHALL, UNDER
ANY CIRCUMSTANCES, CREATE ANY IMPLICATION THAT THERE HAS BEEN NO CHANGE IN THE
AFFAIRS OF THE COMPANY SINCE THE DATE AS OF WHICH INFORMATION IS GIVEN IN THIS
PROSPECTUS. THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER OR SOLICITATION BY
ANYONE IN ANY JURISDICTION IN WHICH SUCH OFFER OR SOLICITATION IS NOT AUTHORIZED
OR IN WHICH THE PERSON MAKING SUCH OFFER OR SOLICITATION IS NOT QUALIFIED TO DO
SO OR TO ANY PERSON TO WHOM IT IS UNLAWFUL TO MAKE SUCH SOLICITATION.
 
                             ---------------------
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                       PAGE
                                       ----
<S>                                    <C>
Incorporation of Certain Documents by
  Reference..........................    2
Prospectus Summary...................    3
Risk Factors.........................    6
Use of Proceeds......................   14
Dividend Policy......................   14
Price Range of Common Stock..........   14
Capitalization.......................   15
Selected Consolidated Financial
  Data...............................   16
Management's Discussion and Analysis
  of Financial Condition and Results
  of Operations......................   17
Business.............................   23
Glossary.............................   34
Selling Stockholders.................   35
Description of Capital Stock.........   37
Underwriting.........................   39
Legal Matters........................   41
Experts..............................   42
Additional Information...............   42
</TABLE>
 
10,000,000 SHARES
HMT TECHNOLOGY
CORPORATION
COMMON STOCK
($.001 PAR VALUE)
LOGO
SALOMON BROTHERS INC
 
ALEX. BROWN & SONS
        INCORPORATED
 
HAMBRECHT & QUIST
ROBERTSON, STEPHENS & COMPANY
PROSPECTUS
 
DATED AUGUST 13, 1997
<PAGE>   44
 
PROSPECTUS
 
10,000,000 SHARES
 
LOGO
 
COMMON STOCK
($.001 PAR VALUE)
 
Of the 10,000,000 shares (the "Shares") of Common Stock of HMT Technology
Corporation ("HMT" or the "Company") offered hereby, 1,000,000 are being sold by
the Company and 9,000,000 are being sold by certain stockholders of the Company
(the "Selling Stockholders"). See "Selling Stockholders." The Company will not
receive any of the proceeds from the sale of the Common Stock by the Selling
Stockholders.
 
Of the 10,000,000 Shares being offered hereby, 1,500,000 Shares are being
offered outside the United States and Canada (the "International Offering") and
8,500,000 Shares are being offered in a concurrent offering in the United States
and Canada (the "U.S. Offering" and, together with the International Offering,
the "Offerings"), subject to transfers between the International Underwriters
and the U.S. Underwriters (collectively, the "Underwriters"). The Price to
Public and Underwriting Discount per share will be identical for the
International Offering and the U.S. Offering. See "Underwriting." The closing of
the International Offering and U.S. Offering are conditioned upon each other.
 
The Common Stock of the Company is traded on the Nasdaq National Market under
the symbol "HMTT." On August 13, 1997, the last reported sales price for the
Common Stock of the Company as reported by the Nasdaq National Market was $14.94
per share. See "Price Range of Common Stock."
 
SEE "RISK FACTORS" COMMENCING ON PAGE 6 FOR A DISCUSSION OF CERTAIN FACTORS
RELEVANT TO AN INVESTMENT IN THE COMMON STOCK OFFERED HEREBY.
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.
 
<TABLE>
<CAPTION>
- -----------------------------------------------------------------------------------------------------------
                                       PRICE TO        UNDERWRITING       PROCEEDS TO
                                        PUBLIC           DISCOUNT         COMPANY(1)        PROCEEDS TO
                                                                                              SELLING
                                                                                            STOCKHOLDERS
<S>                                <C>               <C>               <C>               <C>
Per Share......................... $14.50            $0.61             $13.89            $13.89
Total(2).......................... $145,000,000      $6,100,000        $13,890,000       $125,010,000
- -----------------------------------------------------------------------------------------------------------
</TABLE>
 
(1) Before deducting offering expenses payable by the Company estimated at
    $500,000.
 
(2) The Company and the Selling Stockholders have granted the International
    Underwriters and the U.S. Underwriters 30-day options to purchase up to
    225,000 and 1,275,000 additional Shares, respectively, solely to cover
    over-allotments, if any. If the Underwriters exercise these options in full,
    the total Price to Public, Underwriting Discount, Proceeds to Company and
    Proceeds to Selling Stockholders will be $166,750,000, $7,015,000,
    $15,973,500, and $143,761,500, respectively. See "Underwriting."
 
The Shares are offered subject to receipt and acceptance by the Underwriters, to
prior sale and to the Underwriters' right to reject any order in whole or in
part and to withdraw, cancel or modify the offer without notice. It is expected
that delivery of the Shares will be made at the office of Salomon Brothers Inc,
Seven World Trade Center, New York, New York, or through the facilities of The
Depository Trust Company, on or about August 19, 1997.
 
SALOMON BROTHERS INTERNATIONAL LIMITED
              ALEX. BROWN & SONS
                      INTERNATIONAL
 
                            HAMBRECHT & QUIST
 
                                        ROBERTSON, STEPHENS & COMPANY
 
The date of this Prospectus is August 13, 1997
<PAGE>   45
 
                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
 
     The following documents filed by the Company with the Securities and
Exchange Commission (the "Commission") (File No. 0-27586) pursuant to the
Securities Exchange Act of 1934, as amended (the "Exchange Act") are
incorporated herein by reference:
 
     1. The Company's Annual Report on Form 10-K (the "Company's Annual Report
        on Form 10-K"), for the fiscal year ended March 31, 1997.
 
     2. The Company's Quarterly Report on Form 10-Q, as amended by Form 10-Q/A,
        for the fiscal quarter ended June 30, 1997.
 
     3. The Company's Registration Statement on Form 8-A filed with the
        Commission on January 19, 1996.
 
     In addition, all reports and other documents subsequently filed by the
Company pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act after
the date of this Prospectus and prior to the termination of the offering shall
be deemed to be incorporated by reference herein and to be a part hereof from
the date of filing of such documents. Any statement contained in a document
incorporated by reference herein shall be deemed to be modified or superseded
for purposes of this Prospectus to the extent that a statement contained herein
or in any subsequently filed document that is also or is deemed to be
incorporated by reference herein modifies or supersedes such statement. Any such
statement so modified or superseded shall not be deemed, except as so modified
or superseded, to constitute a part of this Prospectus.
 
     The Company will provide without charge to each person, including any
beneficial owner, to whom this Prospectus is delivered, upon the written or oral
request of such person, a copy of any and all of the documents that are
incorporated herein by reference (other than exhibits to such documents, unless
such exhibits are specifically incorporated by reference into such documents).
Requests for such documents should be directed to HMT Technology Corporation,
Attn: Investor Relations, 1055 Page Avenue, Fremont, California 94538, telephone
number: (510) 683-6000.
 
     The HMT Technology logo is a trademark of the Company.
                            ------------------------
 
     CERTAIN PERSONS PARTICIPATING IN THIS OFFERING MAY ENGAGE IN TRANSACTIONS
THAT STABILIZE, MAINTAIN OR OTHERWISE AFFECT THE PRICE OF THE COMMON STOCK
INCLUDING BY ENTERING STABILIZING BIDS OR EFFECTING SYNDICATE COVERING
TRANSACTIONS. FOR A DESCRIPTION OF THESE ACTIVITIES, SEE "UNDERWRITING."
                            ------------------------
 
     IN CONNECTION WITH THIS OFFERING, CERTAIN UNDERWRITERS AND SELLING GROUP
MEMBERS (IF ANY) OR THEIR RESPECTIVE AFFILIATES MAY ENGAGE IN PASSIVE MARKET
MAKING TRANSACTIONS IN THE COMMON STOCK ON THE NASDAQ NATIONAL MARKET IN
ACCORDANCE WITH RULE 103 OF REGULATION M. SEE "UNDERWRITING."
 
                                        2
<PAGE>   46
 
                               PROSPECTUS SUMMARY
 
     The following summary is qualified in its entirety by the more detailed
information and financial data, including "Risk Factors," appearing elsewhere in
this Prospectus, and in the documents incorporated herein by reference. This
Prospectus contains forward-looking statements which involve risks and
uncertainties. The Company's actual results may differ significantly from the
results discussed in the forward-looking statements. Factors that might cause
such a difference include, but are not limited to, those discussed in "Risk
Factors." The definition of certain terms may be found in the Glossary on page
34.
 
                                  THE COMPANY
 
     HMT is an independent supplier of high-performance thin film disks for
high-end, high-capacity hard disk drives, which in turn are used in high-end
personal computers ("PCs"), network servers and workstations. The disks
currently being shipped by the Company are primarily for disk drives with
storage capacities ranging from 2.0 to 10.0 gigabytes (using two to 12 disks),
and substantially all have coercivity levels of 2000 Oe or higher. The Company
also supplies high-performance thin film disks for removable hard disk drives.
Since March 1994, the Company has focused on addressing the needs of the
high-end, high-capacity segment of the disk drive market. HMT believes that its
recent operating results reflect its success in meeting these needs and that its
future growth and success depend on its ability to continue to develop and
market products that enable its customers to produce high-performance disk
drives for high-end data storage applications. The Company provides a range of
magnetic density points (coercivities), glide heights and disk thicknesses to
meet the design and performance requirements of each particular customer. The
Company's principal customers currently include Maxtor Corporation ("Maxtor"),
Samsung Electronics Company Limited ("Samsung"), Iomega Corporation ("Iomega"),
Western Digital Corporation ("Western Digital"), Micropolis Corporation
("Micropolis") and Quantum Corporation ("Quantum").
 
     Market demand for disks and disk drives has been growing steadily,
stimulated by demand for new computers, upgrades to existing computers and the
growing use of sophisticated network servers. The combined demand from the PC
and server markets has resulted in strong growth in unit shipments of disk
drives, which in turn has stimulated the growth of the thin film disk market.
According to Trend Focus, there were 340 million thin film disks produced in
1996, with an estimated market value of $4.0 billion. Trend Focus projects that
the total market for thin film disks will reach 725 million units in 2000, with
an estimated market value of $7.9 billion.
 
     The most significant technological challenges facing disk manufacturers
today are associated with market demand for increased storage capacity and
durability. An effective implementation of thin film technology to meet these
challenges must address various performance-related characteristics, including
magnetics, glide height, durability and stiction. HMT focuses on providing
value-added technological solutions that meet the demands of the high-end,
high-capacity disk drive market. The Company develops, manufactures and sells
technologically advanced products designed to provide improved performance,
principally through achieving higher coercivities and lower glide heights. The
Company seeks to be a supplier to disk drive manufacturers with a proven record
for technological leadership because these customers have the greatest ability
to fully exploit the value of technologically superior disks.
 
     HMT believes that its internally developed proprietary and patented
manufacturing processes and state-of-the-art equipment, to which it has made
proprietary modifications, combined with its extensive expertise, currently
provide HMT with a technological advantage over competing independent thin film
disk manufacturers. Particularly important to the Company's success are its
unique tribology approach, its commitment to developing disks for drives
utilizing new head technology and its ability to produce high-coercivity disks
using non-precious metal alloys.
 
                                        3
<PAGE>   47
 
     The key elements of HMT's strategy are as follows: establish and maintain
leadership in high-end product technology; develop collaborative relationships
with leading head manufacturers and disk drive manufacturers; develop advanced
manufacturing processes to support volume production; expand manufacturing
capacity; and maintain strict quality control of manufacturing processes.
 
     The Company recently completed construction of a 124,000 square foot
production facility at its Fremont, California site, in which it had brought
into service six production scale sputtering lines by the end of the first
quarter of fiscal 1998. The Company plans to install up to 10 additional
sputtering lines in this facility. In addition, the Company completed an
expansion of its facility in Eugene, Oregon during fiscal 1997, where it
produces aluminum substrates and nickel-plated and polished substrates.
 
     HMT was incorporated in Delaware in 1988. The Company's principal executive
offices are located at 1055 Page Avenue, Fremont, California 94538; telephone
number: (510) 683-6000.
 
                                 THE OFFERINGS
 
<TABLE>
<S>                                         <C>
Common Stock offered by the Company
  U.S. Offering...........................  850,000 shares
  International Offering..................  150,000 shares
          Total...........................  1,000,000 shares
Common Stock offered by the Selling
  Stockholders
  U.S. Offering...........................  7,650,000 shares
  International Offering..................  1,350,000 shares
          Total...........................  9,000,000 shares
Common Stock to be outstanding
  after the Offerings.....................  42,334,565 shares(1)
Use of Proceeds...........................  Capital expenditures, working capital and other
                                            general corporate purposes. The Company will not
                                            receive any proceeds from the sale of shares of
                                            Common Stock in the Offerings by the Selling
                                            Stockholders. See "Use of Proceeds."
Nasdaq National Market symbol.............  HMTT
</TABLE>
 
- ---------------
 
(1) Based on shares outstanding as of August 13, 1997. Excludes as of such date
    4,023,143 shares of Common Stock issuable upon exercise of outstanding stock
    options at a weighted average exercise price of $5.61 per share and 210,397
    shares issuable upon exercise of an outstanding warrant at an exercise price
    of $0.0003 per share.
 
                                        4
<PAGE>   48
 
                      SUMMARY CONSOLIDATED FINANCIAL DATA
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)
 
<TABLE>
<CAPTION>
                                                                                                       THREE MONTHS ENDED
                                                          YEAR ENDED MARCH 31,                              JUNE 30,
                                      ------------------------------------------------------------     -------------------
                                        1993         1994         1995         1996         1997        1996        1997
                                      --------     --------     --------     --------     --------     -------     -------
                                                                                                           (UNAUDITED)
<S>                                   <C>          <C>          <C>          <C>          <C>          <C>         <C>
STATEMENT OF OPERATIONS DATA:
Net sales...........................  $ 70,987     $ 64,242     $ 72,893     $194,401     $263,209     $76,420     $76,837
Gross profit (loss).................    (5,250)      (3,406)       5,354       74,598      106,932      32,406      29,361
Operating income (loss).............   (12,474)     (11,302)      (2,006)      58,674       89,317      28,110      23,641
Net income (loss) available for
  common stockholders...............  $(17,056)    $(17,325)    $ (8,941)    $ 45,222     $ 61,745     $15,895     $15,369
Net income (loss) available for
  common stockholders per share(1)..  $  (0.49)    $  (0.50)    $  (0.26)    $   1.28     $   1.35     $  0.36     $  0.31
Shares used in computing per share
  amounts(1)........................    34,822       34,822       34,822       35,224       46,027      44,015      53,805
</TABLE>
 
<TABLE>
<CAPTION>
                                                                           JUNE 30, 1997
                                                                     -------------------------
                                                                      ACTUAL    AS ADJUSTED(2)
                                                                     --------   --------------
                                                                     (UNAUDITED)
<S>                                                                  <C>        <C>
BALANCE SHEET DATA:
Working capital....................................................  $ 61,513      $ 74,903
Total assets.......................................................  $406,252      $419,642
Total liabilities..................................................  $294,392      $294,392
Total stockholders' equity.........................................  $111,860      $125,250
</TABLE>
 
- ---------------
 
(1) See Note 1 of Notes to the Consolidated Financial Statements included in the
    Company's Annual Report on Form 10-K and incorporated by reference into this
    Prospectus for an explanation of the determination of the number of fully
    diluted shares used in computing net income (loss) per share.
 
(2) Adjusted to reflect the sale of the Shares in the Offerings at the public
    offering price of $14.50 per share, after deducting underwriting discounts
    and commissions and the offering expenses payable by the Company, and the
    application of the net proceeds therefrom. See "Use of Proceeds."
 
     Unless otherwise indicated, all information contained in this Prospectus
assumes no exercise of the Underwriters' over-allotment option. See
"Underwriting." The Company operates under thirteen-to-fourteen-week quarters
that end on the Sunday closest to calendar quarter end. As a result, a fiscal
quarter may not end on the same day as the calendar quarter end. For convenience
of presentation, financial information has been shown as ending on the last day
of the calendar quarter.
 
                                        5
<PAGE>   49
 
                                  RISK FACTORS
 
     In addition to the other information in this Prospectus, the following risk
factors should be considered carefully in evaluating the Company and its
business. This Prospectus contains forward-looking statements which involve
risks and uncertainties. The Company's actual results may differ significantly
from the results discussed in the forward-looking statements. Factors that might
cause such a difference include, but are not limited to, those discussed below.
 
FLUCTUATIONS IN OPERATING RESULTS
 
     The Company's operating results historically have been, and may continue to
be, subject to significant quarterly and annual fluctuations. As a result, the
Company's operating results in any quarter may not be indicative of its future
performance. Factors affecting operating results include but are not limited to:
market acceptance of new products; timing of significant orders; changes in
pricing by the Company or its competitors; timing of product announcements and
product transitions by the Company, its customers or its competitors; order
cancellations, modifications and quantity adjustments and shipment
reschedulings; changes in product mix; manufacturing yields; the level of
utilization of the Company's production capacity; increases in production and
engineering costs associated with initial manufacture of new products; and
changes in the cost of or limitations on the availability of materials. The
impact of these and other factors on the Company's revenues and operating
results in any future period cannot be forecasted with certainty. The Company's
expense levels are based, in part, on its expectations as to future revenues.
Because the Company's sales are generally made pursuant to purchase orders that
are subject to cancellation, modification, quantity reduction or rescheduling on
short notice and without significant penalties, the Company's backlog as of any
particular date may not be indicative of sales for any future period, and such
changes could cause the Company's net sales to fall below expected levels. If
revenue levels are below expectations, operating results are likely to be
materially adversely affected. Net income, if any, and gross margins may be
disproportionately affected by a reduction in net sales because a
proportionately smaller amount of the Company's expenses varies with its
revenues. See "-- Dependence on Suppliers" and "Management's Discussion and
Analysis of Financial Condition and Results of Operations."
 
     The Company derives substantially all of its net sales from the sale of
thin film disks to a small number of customers. The Company typically supplies
disks in volume for a limited number of disk drive products (11, as of June 30,
1997) at any one time, and these products have an extremely short life cycle.
Due to the rapid technological change and frequent development of new disk drive
products, it is common in the industry for the relative mix of customers and
products to change rapidly, even from quarter to quarter. Generally, new
products have higher average selling prices than more mature products.
Therefore, the Company's ability to introduce new products in a timely fashion
is an important factor in its continued success. Manufacturing yields and
production capacity utilization may impact the Company's operating results. New
products often have lower manufacturing yields and are produced in lower
quantities than more mature products. If production for a disproportionate
number of new products is commenced in a given quarter or if manufacturing
yields for such products do not improve in a timely manner, the Company's
operating results for such quarter could be adversely affected. For example,
during the quarter ended March 31, 1997, the Company's operating results were
adversely affected due partly to lower yields associated with initial production
of a significant number of new products. Manufacturing yields generally improve
as the product matures and production volumes increase. Manufacturing yields
also vary depending on the complexity and uniqueness of product specifications.
The ability to adjust manufacturing procedures to reduce costs and improve
manufacturing yields and productivity during a product's life is limited, and
many adjustments can only be implemented in connection with new product
introductions or upgrades. Small variations in manufacturing yields and
productivity can have a significant impact on operating results. Furthermore,
because the thin film disk industry is capital intensive and requires a high
level of fixed costs, operating results are also extremely sensitive to changes
in volume. Substantial advance planning and commitment of financial and other
resources is necessary for expansion of manufacturing capacity, while the
Company's sales are generally
 
                                        6
<PAGE>   50
 
made pursuant to purchase orders that are subject to cancellation, modification,
quantity reduction or rescheduling without significant penalties. The impact of
any of the foregoing factors could have a material adverse effect on the
Company's business, operating results and financial condition.
 
DEPENDENCE ON A LIMITED NUMBER OF CUSTOMERS; LENGTHY SALES CYCLE
 
     During fiscal 1997, the Company shipped most of its thin film disks to four
customers: Maxtor, Samsung, Iomega and Western Digital. Aggregate shipments to
Maxtor, Samsung, Iomega and Western Digital represented 40.7%, 19.8% 12.2% and
11.9%, respectively, of net sales in fiscal 1997, and 9.7%, 27.7%, 32.1%, and
18.7%, respectively, of net sales in the first quarter of fiscal 1998. There are
a relatively small number of disk drive manufacturers, and the Company expects
that its dependence on a few customers will continue in the future. Loss of, or
a reduction in orders from, one or more of the Company's customers could result
in a substantial reduction in net sales and operating results. Because many of
the Company's expense levels are based, in part, on its expectations as to
future revenues, decreases in net sales may result in a disproportionately
greater negative impact on operating results. The Company's success will
therefore depend on the success of its key customers. One or more of the
Company's customers could develop or expand their ability to produce thin film
disks internally and, as a result, could reduce the level of purchases or cease
purchasing from the Company or could sell thin film disks in competition with
the Company. For example, one of the Company's customers, Western Digital,
manufactures thin film disks for its own use and an affiliate of another
customer, Maxtor, recently began to do so. There has also been a trend toward
consolidation in the disk drive industry, which the Company expects to continue.
For example, in February 1996, two leading disk drive manufacturers, Seagate
Technology, Inc. ("Seagate") and Conner Peripherals, Inc., combined to form the
world's largest disk drive manufacturing company. In addition, during the second
calendar quarter of 1996, Hewlett-Packard announced its intentions to exit the
disk drive business. If any of the Company's customers or competitors were to
combine and reduce suppliers and competitive product lines, the Company's
business, operating results and financial condition could be materially
adversely affected. See "Business -- Customers, Sales and Support."
 
     The Company has generally sold its products to customers pursuant to
purchase orders and similar short-term arrangements. In June 1996, the Company
entered into a long-term supply agreement with Maxtor covering the supply of
disks to Maxtor through June 2001. While this agreement contemplates significant
purchases of disks by Maxtor, it is subject to a number of conditions and
qualifications and there can be no assurance that Maxtor will in fact remain a
significant customer during the term of the agreement.
 
     Qualifying thin film disks for incorporation into a new disk drive product
requires the Company to work extensively with the customer and the customer's
other suppliers to meet product specifications. Therefore, customers often
require a significant number of product presentations and demonstrations, as
well as substantial interaction with the Company's senior management, before
making a purchasing decision. Accordingly, the Company's products typically have
a lengthy sales cycle, which can range from six to 12 months, during which the
Company may expend substantial financial resources and management time and
effort with no assurance that a sale will result.
 
EXPANSION OF CAPACITY
 
     Because the Company has been operating at close to full capacity, growth,
if any, in the Company's net sales depends on the successful expansion by the
Company of its manufacturing capacity. The Company recently completed
construction of a new 124,000 square foot production facility at its Fremont,
California site. The administrative office areas and six production scale
sputtering lines were brought into service by the end of the first quarter of
fiscal 1998. The Company plans to install up to 10 additional production scale
sputtering lines in this new facility. In addition, the Company completed an
expansion of its facility in Eugene, Oregon during fiscal 1997, where it
produces aluminum substrates and nickel-plated and polished substrates. The
Company currently expects to spend in excess of $200 million over the next
twelve months for expansion of production capacity, a substantial majority of
 
                                        7
<PAGE>   51
 
which will be spent on the Company's Fremont, California facility. Any delay in
the completion of any of these expansion programs could have a material adverse
effect on the Company's business, results of operations and financial condition.
 
INTENSE COMPETITION
 
     The market for the Company's products is highly competitive, and the
Company expects competition to continue in the future. Certain of the Company's
competitors have significantly greater financial, technical and marketing
resources than the Company. There can be no assurance that in the future the
Company will be able to develop and manufacture products on a timely basis with
the quality and features necessary in order to remain competitive. Competitors
in the thin film disk industry fall into three groups: U.S. non-captive
manufacturers, Japan-based manufacturers and U.S. captive manufacturers.
Historically, each of these groups has supplied approximately one-third of the
worldwide thin film disk unit output. The Company's primary U.S. non-captive
competitors are Akashic Memories Corporation, a subsidiary of Kubota, Inc.
("Akashic"), Komag, Incorporated ("Komag") and StorMedia Incorporated
("StorMedia"). Japan-based competitors include Fuji Electric Company Limited
("Fuji"), Mitsubishi Kasei Corporation ("Mitsubishi"), Showa Denko K.K. ("Showa
Denko") and Hoya Corporation ("Hoya"). In addition, U.S. captive manufacturers,
which include certain computer manufacturers, as well as disk drive
manufacturers such as Seagate, Western Digital and an affiliate of Maxtor,
manufacture disks or plan to manufacture disks for their internal use as part of
their vertical integration programs. These companies could increase their
internal production and reduce or cease purchasing from independent disk
suppliers such as the Company. In the event of an oversupply of disks, these
customers are likely to utilize their internal capacity prior to purchasing
disks from independent suppliers such as the Company. Moreover, while captive
manufacturers have, to date, sold only nominal quantities of thin film disks in
the open market, there can be no assurance that such companies will not in the
future do so in direct competition with the Company. Furthermore, there can be
no assurance that other current and potential customers will not acquire or
develop capacity to produce thin film disks for internal use or that disk
manufacturing capacity will not exceed demand. Any such changes could have a
material adverse effect on the Company's business, operating results and
financial condition.
 
     Announcement or implementation of any of the following by the Company's
competitors could have a material adverse effect on the Company's business,
operating results and financial condition: changes in pricing, product
introductions, increases in production capacity, changes in product mix and
technological innovation. The thin film disk industry is characterized by
intense price competition. The Company has experienced pricing pressures in the
past, and there can be no assurance that the Company will not experience
increased price competition in the future. Pricing pressure has included, and
may in the future include, demands for discounts, long-term supply commitments
and extended payment terms. Any increase in price competition could have a
material adverse effect on the Company's business, operating results and
financial condition. The Company and certain of its competitors are currently
engaged in substantial efforts to increase disk manufacturing capacity. To the
extent that these efforts result in industry capacity in excess of levels of
demand, the Company could experience increased levels of competition, which
could have a material adverse effect on the Company's business, operating
results and financial condition. See "Business -- Competition."
 
MANAGEMENT OF GROWTH
 
     The Company has experienced a period of rapid expansion in its operations,
including the organization and management of a significant expansion in
manufacturing capacity that has placed, and may continue to place, a significant
strain on the Company's management and other resources. The Company's status as
a public company since its March 1996 initial public offering has placed
additional demands on the Company's management, including its finance and
accounting organization and information systems. The Company currently plans to
install a new enterprise-wide integrated financial, accounting and manufacturing
information system beginning in the third quarter of fiscal 1998. There can be
no assurance that the Company will be able to complete this implementation
without disruption to its
 
                                        8
<PAGE>   52
 
business, that such efforts will be achieved at acceptable expense levels or
that such efforts will not distract the attention of management of the Company.
The Company's ability to manage its operations effectively will require it to
continue to improve its operational, financial and management information
systems, and to train, motivate and manage its employees. If the Company's
management is unable to manage its operations effectively, the Company's
business, operating results and financial condition could be adversely affected.
 
DEPENDENCE ON INTENSELY COMPETITIVE AND CYCLICAL HARD DISK DRIVE INDUSTRY
 
     The Company's operating results are primarily dependent on current and
anticipated demand for high-end, high-capacity hard disk drives, which in turn
depend on the demand for high-end PCs, network servers and workstations. The
disk drive industry is cyclical and historically has experienced periods of
oversupply and reduced production levels, resulting in significantly reduced
demand for thin film disks, as well as pricing pressures. The effect of these
cycles on suppliers, including thin film disk manufacturers, has been magnified
by hard disk drive manufacturers' practice of ordering components, including
thin film disks, in excess of their needs during periods of rapid growth, which
increases the severity of the drop in the demand for components during periods
of reduced growth or contraction. In recent years, the disk drive industry has
experienced significant growth, providing the Company with the opportunity to
expand its capacity. There can be no assurance that such growth will continue,
that the level of demand will not decline, or that future demand will be
sufficient to support existing and future capacity. A decline in demand for hard
disk drives would have a material adverse effect on the Company's business,
operating results and financial condition. See "Management's Discussion and
Analysis of Financial Condition and Results of Operations." Additionally, the
hard disk drive industry is intensely competitive, and, in the past, some disk
drive manufacturers have experienced substantial financial difficulties. To
date, the Company has not incurred significant bad debt expense. However, there
can be no assurance that the Company will not face greater difficulty in
collecting receivables or be required to offer more liberal payment terms in the
future, particularly in a period of reduced demand. Any failure to collect or
delay in collecting receivables could have a material adverse effect on the
Company's business, operating results and financial condition. See
"Business -- Customers, Sales and Support."
 
RAPID TECHNOLOGICAL CHANGE
 
     The thin film disk industry has been characterized by rapid technological
development and short product life cycles. Product life cycles typically range
from nine to twelve months. As a result, the Company must continually
anticipate, and adapt its products to meet, demand for increased storage
capacity. Although the Company is continually developing new products and
production techniques, there can be no assurance that the Company will be able
to anticipate technological advances in disk drives and develop products
incorporating such advances in a timely manner or to compete effectively against
its competitors' new products. In addition, there can be no assurance that
customers will certify the Company's products for inclusion in new disk drive
products. The Company anticipates continued changes in the requirements of the
disk drive industry and thin film disk manufacturing technologies, and there can
be no assurance that the future technological innovations will not reduce demand
for thin film disks. The Company's business, operating results and financial
condition will be materially adversely affected if the Company's efforts are not
successful, if the technologies that the Company has chosen not to develop prove
to be competitive alternatives or if any trend develops toward technology that
would replace thin film disks as a storage medium. See "Business -- Industry
Background -- Challenges Facing the Disk Drive Industry" and "-- Products."
 
DEPENDENCE ON SUPPLIERS
 
     The Company relies on a limited number of suppliers for many materials used
in its manufacturing processes, including aluminum blanks, substrates,
texturizers, plating chemicals, abrasive tapes and slurries, certifier heads,
sputter targets and certain other materials. In general, the Company seeks to
have two or three suppliers for its requirements; however, there can be no
assurance that the Company
 
                                        9
<PAGE>   53
 
can secure more than one source for all of its materials requirements in the
future or that its suppliers will be able to meet the Company's requirements on
a timely basis or on acceptable terms. Shortages have occurred in the past and
there can be no assurance that shortages will not occur in the future, or that
materials will be available without longer lead times. Moreover, changing
suppliers for certain materials, such as lube or buffing tape, would require
that the product be requalified with each customer. Requalification could
prevent an early design-in, or could prevent or delay continued participation in
disk drive programs for which the Company's products have been qualified. In
addition, long lead times are required to obtain many materials. Regardless of
whether these materials are available from established or new sources of supply,
these lead times could impede the Company's ability to quickly respond to
changes in demand and product requirements. Furthermore, a significant increase
in the price of one or more of these materials could adversely affect the
Company's business, operating results and financial condition. In addition,
there are only a limited number of providers for thin film disk manufacturing
equipment, such as sputtering machines, glide testers and certifiers, and
ordering additional equipment for replacement or expansion requires long lead
times, limiting the rate and flexibility of capacity expansion. Any limitations
on, or delays in, the supply of materials or equipment could disrupt the
Company's production volume and could have a material adverse effect on the
Company's business, operating results and financial condition.
 
PROCESS QUALITY CONTROL RISKS
 
     The manufacture of the Company's high-performance thin film disks requires
a tightly controlled multi-stage process and the use of high-quality materials.
Efficient production of the Company's products requires utilization of advanced
manufacturing techniques and clean room facilities. Disk fabrication occurs in a
highly controlled, clean environment to minimize dust and other yield- and
quality-limiting contaminants. Despite stringent manufacturing controls,
weaknesses in process control or minute impurities in materials may cause a
substantial percentage of the disks in a lot to be defective. The success of the
Company's manufacturing operation depends in part on the Company's ability to
maintain process control and minimize such impurities in order to maximize its
yield of acceptable high-quality disks. Minor variations from the Company's
specifications could have a disproportionate effect on manufacturing yields. For
example, in the quarter ended March 31, 1995, the Company's operating results
were materially adversely affected by chlorine contamination of its thin film
disk products that it believes resulted from chlorine contamination of disk
carriers provided by one of its suppliers. While the Company has implemented
procedures to monitor its manufacturing process and the quality of production
materials, there can be no assurance that such procedures will be adequate. See
"Business -- Manufacturing and Quality -- Quality Assurance."
 
NEED FOR ADDITIONAL FINANCING
 
     The disk media business is capital intensive, and the Company believes that
in order to remain competitive, it may need significant additional financing
over the next several years for capital expenditures, working capital, and
research and development. Among other things, the Company's customers prefer
suppliers that can meet a substantial portion of their volume requirements, so
the Company will need to expand its manufacturing capacity to remain
competitive. The Company currently expects to spend in excess of $200 million on
capital expenditures directed toward expansion of production capacity over the
next twelve months. The Company believes existing cash balances, cash generated
from operations, and funds available under its credit facility will provide
adequate cash to fund its operations for at least the next twelve months. While
operating activities are expected to provide cash in certain periods, continued
expansion of the Company's manufacturing capacity may require the Company to
obtain additional sources of financing. Additional sources of long-term
liquidity could include cash generated from operations and debt and equity
financings. The Company continues to have significant future obligations and
expects that it may require additional capital to support continued expansion of
the Company's manufacturing capacity and growth, if any. There can be no
assurance that the Company will be able to obtain alternative sources of
financing on favorable terms, if at all, at such time or times as the Company
may require such capital. See "Use of Proceeds," "Capitalization" and
"Management's
 
                                       10
<PAGE>   54
 
Discussion and Analysis of Financial Condition and Results of
Operations -- Liquidity and Capital Resources."
 
INTELLECTUAL PROPERTY AND PROPRIETARY RIGHTS
 
     Although the Company attempts to protect its intellectual property rights
through patents, copyrights, trade secrets and other measures, there can be no
assurance that the Company will be able to protect its technology adequately or
that competitors will not be able to develop similar technology independently.
The Company has 34 patents and 18 pending patent applications in the United
States. In addition, the Company has nine foreign patents. Patents may not be
issued with respect to the Company's pending patent applications, and its issued
patents may not be sufficiently broad to protect the Company's technology. No
assurance can be given that any patent issued to the Company will not be
challenged, invalidated or circumvented or that the rights granted thereunder
will provide adequate protection to the Company's products. In addition, the
Company has only limited patent rights outside the United States, and the laws
of certain foreign countries may not protect the Company's intellectual property
rights to the same extent as do the laws of the United States.
 
     The Company is from time to time notified by third parties that it may be
infringing patents owned by such third parties. If necessary, the Company may
have to seek a license under such patents or modify its products and processes
in order to avoid infringement of such patents. There can be no assurance that
such a license would be available on acceptable terms, if at all, or that the
Company could so avoid infringement of such patents, in which case the Company's
business, operating results and financial condition could be materially
adversely affected.
 
     On December 16, 1996 and July 1, 1997, Virgle L. Hedgcoth filed complaints
against the Company and several other entities in the Federal District Court for
the Northern District of California. In each complaint, Mr. Hedgcoth alleges
that certain HMT disks infringe patents allegedly owned by him. Each complaint
seeks an injunction and unspecified damages, which are sought to be trebled.
With respect to the December 16, 1996 complaint, the Company has filed a
counterclaim seeking a declaratory judgment that such patents are invalid and
unenforceable and that they are not infringed by the HMT disks. The Company
intends to defend both cases vigorously and does not believe that the litigation
Mr. Hedgcoth has pursued will have a material adverse effect on the Company's
business, operating results or financial condition.
 
     Litigation may be necessary to enforce the Company's patents, copyrights or
other intellectual property rights, to protect the Company's trade secrets, to
determine the validity and scope of the proprietary rights of others, or to
defend against claims of infringement or claims for indemnification resulting
from infringement claims by third parties. Such litigation, even if successful,
could result in substantial costs and diversion of resources and could have a
material adverse effect on the Company's business, operating results and
financial condition.
 
DEPENDENCE ON KEY PERSONNEL
 
     The Company's future operating results depend in significant part upon the
continued contributions of its officers and personnel, many of whom would be
difficult to replace. The Company does not have employment agreements with any
employee. The loss of its officers or other key personnel, who are critical to
the Company's success, could have a material adverse effect on the business,
operating results and financial condition of the Company. In addition, the
Company's future operating results depend in part upon its ability to attract,
train, retain and motivate other qualified management, technical, manufacturing,
sales and support personnel for its operations. Competition for such personnel
is intense, especially since many of the Company's competitors are located near
the Company's facilities in Fremont, California. Among the competitive factors
in attracting personnel are compensation and benefits, equity incentives and
geographic location. There can be no assurance that the Company will be
successful in attracting or retaining such personnel. The loss of the services
of existing personnel as well
 
                                       11
<PAGE>   55
 
as the failure to recruit additional personnel could materially adversely effect
the Company's business, operating results and financial condition.
 
DEPENDENCE ON FREMONT MANUFACTURING FACILITIES; ENVIRONMENTAL ISSUES
 
     The Company's Fremont facilities, which currently account for all of its
finished products, are located near major earthquake faults. Disruption of
operations for any reason, including power failures, work stoppages or natural
disasters such as fire, floods or earthquakes, would cause delays in, or an
interruption of, production and shipment of products, which could materially
adversely affect the Company's business, operating results and financial
condition. See "Business -- Manufacturing and Quality -- Manufacturing
Facilities and Capacity."
 
     The Company's operations and manufacturing processes are subject to certain
environmental laws and regulations, which govern the Company's use, handling,
storage, transportation, disposal, emission and discharge of hazardous materials
and wastes, the pre-treatment and discharge of process waste waters and its
emission of air pollutants. The Company has from time to time been notified of
minor violations of environmental laws and regulations. These violations have
been corrected in all material respects without undue expense. Additionally,
existing waste water treatment facilities and air emission control devices are
being upgraded to accommodate increased production and more restrictive
environmental discharge levels. Environmental laws and regulations, however, may
become more stringent over time, and there can be no assurance that the
Company's failure to comply with either present or future laws or regulations,
which may become more stringent, would not subject the Company to significant
compliance expenses, production suspension or delay, restrictions on expansion
or the acquisition of costly equipment.
 
RISKS OF INTERNATIONAL SALES
 
     In fiscal 1996 and 1997, substantially all of the Company's net sales
consisted of products delivered to customers in Asia, primarily foreign
subsidiaries of U.S. companies, and the Company anticipates that the substantial
majority of its products will be delivered to customers outside of the United
States for the foreseeable future. Accordingly, the Company's operating results
are subject to the risks of doing business in foreign jurisdictions, including
compliance with, or changes in, the law and regulatory requirements of foreign
jurisdictions, local content rules, taxes, tariffs or other barriers, and
transportation delays and other interruptions. Although presently all of the
Company's sales are made in U.S. dollars, there can be no assurance that future
international sales will not be denominated in foreign currency.
 
SHARES ELIGIBLE FOR FUTURE SALE; REGISTRATION RIGHTS
 
     Sales of substantial amounts of the Company's Common Stock in the public
market could adversely affect the market price of the Company's Common Stock and
the Company's ability to raise additional capital at a price favorable to the
Company. Based on beneficial ownership of Common Stock as set forth under
"Selling Stockholders," executive officers, directors and certain stockholders
holding an aggregate of 26,579,533 shares of Common Stock have entered into
lockup agreements with the Underwriters (the "Lockup Agreements") pursuant to
which shares may not be offered, sold or otherwise disposed of, with certain
limited exceptions, without the prior written consent of Salomon Brothers Inc
for a period of 90 days after the date of this Prospectus (ending November 11,
1997). Upon expiration of the Lockup Agreements, 26,279,533 of such shares will
be available for sale pursuant to Rule 144 adopted under the Securities Act,
subject to the volume limitations under Rule 144, so long as the holders of such
shares continue to be affiliates of the Company. Upon the expiration of the
Lockup Agreements, the remaining approximately 300,000 shares covered by the
Lockup Agreements will be available for sale, subject to certain volume
limitations under Rule 144. Such shares will no longer be "restricted shares"
under Rule 144 upon the expiration of a two-year period from the date such
shares were acquired (November 30, 1995). The holders of the 25,419,380 shares
also have the right to require the Company to register such shares for sale to
the public under agreements with the Company. See "Description of Capital
Stock -- Registration Rights."
 
                                       12
<PAGE>   56
 
     The Company has registered under the Securities Act an aggregate of
7,312,029 shares of Common Stock reserved for issuance under the Company's 1995
Management Stock Option Plan, the 1995 Stock Option Plan, the 1996 Equity
Incentive Plan, the 1996 Non-Employee Directors' Stock Option Plan and the
Employee Stock Purchase Plan (collectively, the "Stock Plans"), thus permitting
the sale of such shares by non-affiliates in the public market without
restriction under the Securities Act. The shares registered include shares
issuable upon exercise of options to purchase 13,760,595 shares that were issued
and outstanding at June 30, 1997, of which options to purchase approximately
6,549,718 shares were exercisable and immediately saleable. The remainder of
these shares will become exercisable and saleable at various dates through
December 1999 pursuant to monthly vesting.
 
CONTROL BY EXISTING STOCKHOLDERS AND ANTI-TAKEOVER EFFECTS
 
     Based on shares outstanding at June 30, 1997 (after giving effect to the
Offerings), directors, officers and holders of 5% or more of the outstanding
shares of Common Stock of the Company owned approximately 41% of the outstanding
shares of Common Stock (31% assuming conversion of the Company's 5 3/4%
Convertible Subordinated Notes due 2004 and exercise of all outstanding options
and warrants to purchase Common Stock). As a result, the directors, officers and
holders of 5% or more of the outstanding shares of the Company's Common Stock,
acting together, will have the ability to significantly influence the election
of the Company's directors and to influence most corporate actions. Certain
provisions of the Company's Amended and Restated Certificate of Incorporation,
Bylaws and Delaware law, including the provisions of Section 203 of the Delaware
General Corporation Law, which restrict the ability of a substantial stockholder
to acquire the Company, may also discourage certain transactions involving a
change in control of the Company. In addition to the foregoing, the ability of
the Board of Directors to issue "blank check" preferred stock without further
stockholder approval could have the effect of delaying, deferring or preventing
a change in control of the Company. See "Selling Stockholders" and "Description
of Capital Stock."
 
VOLATILITY OF COMMON STOCK PRICES
 
     The trading price of the Company's Common Stock could be subject to wide
fluctuations in response to a variety of factors, including quarterly variations
in operating results, announcements of technological innovations or new products
by the Company, its customers or its competitors, developments in patents or
other intellectual property rights, general conditions in the computer or disk
drive industry, and general economic and market conditions. Additionally, the
stock market in general, and the market for technology stocks in particular, has
experienced extreme price volatility in recent years. This volatility has often
had a substantial effect on the market prices of many technology companies for
reasons unrelated or disproportionate to the operating performance of such
companies. Broad market fluctuations could have a significant impact on the
market price of the Common Stock.
 
                                       13
<PAGE>   57
 
                                USE OF PROCEEDS
 
     The net proceeds to the Company from the sale of the 1,000,000 shares of
Common Stock by the Company in the Offerings are estimated to be approximately
$13.4 million (approximately $15.5 million if the Underwriters' over-allotment
options are exercised in full), based upon the public offering price of $14.50
per share and after deducting estimated underwriting discounts and commissions
and offering expenses. The Company will not receive any of the proceeds from the
sale of the shares of Common Stock offered by the Selling Stockholders. The
Company expects to use the net proceeds of this offering for capital
expenditures, working capital and other general corporate purposes. Pending such
uses, the Company intends to invest the net proceeds from these Offerings in
interest-bearing investment grade securities.
 
                                DIVIDEND POLICY
 
     The Company has never declared or paid cash dividends on its Common Stock.
The Company currently intends to retain all future earnings for use in its
business and does not anticipate paying cash dividends on the Common Stock in
the foreseeable future. In addition, the terms of the Company's revolving credit
facility prohibit the payment of dividends without the banks' prior approval.
 
                          PRICE RANGE OF COMMON STOCK
 
     The Company's Common Stock has traded publicly under the symbol "HMTT"
since the Company's initial public offering on March 13, 1996. The following
table sets forth the closing prices for the Company's Common Stock as reported
on the Nasdaq National Market for the periods indicated below.
 
<TABLE>
<CAPTION>
                                                                     HIGH            LOW
                                                                   ---------       -------
        <S>                                                        <C>             <C>
        FISCAL YEAR ENDED MARCH 31, 1996
          Fourth Quarter (from March 13, 1996)...................     $11  1/2        $ 9 7/8
 
        FISCAL YEAR ENDED MARCH 31, 1997
          First Quarter..........................................     $28  1/4        $10 1/2
          Second Quarter.........................................      21  3/4         12 3/4
          Third Quarter..........................................      21 11/16        12 5/8
          Fourth Quarter.........................................      22              12 1/4
 
        FISCAL YEAR ENDING MARCH 31, 1998
          First Quarter..........................................     $14  5/8        $10
          Second Quarter (through August 13, 1997)...............      16 11/16        12 3/8
</TABLE>
 
     As of June 30, 1997, there were approximately 237 holders of Common Stock.
On August 13, 1997, the last sale price reported on the Nasdaq National Market
for the Common Stock was $14.94 per share.
 
                                       14
<PAGE>   58
 
                                 CAPITALIZATION
 
     The following table sets forth the capitalization of the Company as of June
30, 1997 (i) on an actual basis and (ii) as adjusted to reflect the net proceeds
of the sale of Common Stock by the Company in the Offerings (at the public
offering price of $14.50 per share). See "Use of Proceeds." This table should be
read in conjunction with the Company's Consolidated Financial Statements and the
Notes thereto which are included in the Company's Annual Report on Form 10-K and
are incorporated by reference into this Prospectus.
<TABLE>
<CAPTION>
                                                                           JUNE 30, 1997
                                                                      ------------------------
                                                                       ACTUAL      AS ADJUSTED
                                                                      --------     -----------
<S>                                                                   <C>          <C>
                                                                            (UNAUDITED)
 
<CAPTION>
                                                                           (IN THOUSANDS)
<S>                                                                   <C>          <C>
5 3/4% Convertible Subordinated Notes due 2004......................  $230,000      $ 230,000
Obligations under capital leases....................................     4,776          4,776
Stockholders' equity:
  Common Stock, $0.001 par value, 100,000,000 shares authorized,
     41,228,793 issued and outstanding, actual; 42,228,793 shares
     issued and outstanding, as adjusted(1).........................        41             42
  Additional paid-in capital........................................    93,161        106,550
  Retained earnings.................................................    95,307         95,307
  Distribution in excess of basis...................................   (76,649)       (76,649)
                                                                       -------        -------
     Total stockholders' equity.....................................   111,860        125,250
                                                                       -------        -------
       Total capitalization.........................................  $346,636      $ 360,026
                                                                       =======        =======
</TABLE>
 
- ---------------
 
(1) Based on shares outstanding as of June 30, 1997. Excludes as of such date
    4,023,143 shares of Common Stock issuable upon exercise of outstanding stock
    options at a weighted average exercise price of $5.61 per share and 210,397
    shares issuable upon exercise of an outstanding warrant at an exercise price
    of $0.0003 per share.
 
                                       15
<PAGE>   59
 
                      SELECTED CONSOLIDATED FINANCIAL DATA
 
     The following selected consolidated financial data of the Company are
qualified in their entirety by, and should be read in conjunction with, the
Management's Discussion and Analysis of Financial Condition and Results of
Operations included elsewhere in this Prospectus and the Consolidated Financial
Statements of the Company, including the notes thereto, incorporated by
reference into this Prospectus. The Consolidated Statements of Operations Data
for the years ended March 31, 1993, 1994, 1995, 1996 and 1997 and the
Consolidated Balance Sheet Data as of March 31, 1995, 1996 and 1997 are derived
from, and are qualified by reference to, the audited Consolidated Financial
Statements incorporated by reference into this Prospectus. The consolidated
statements of operations data for the three months ended June 30, 1996 and 1997,
and the consolidated balance sheet data at June 30, 1997 are derived from
unaudited financial statements incorporated by reference into this Prospectus.
In the opinion of management of the Company, the unaudited consolidated
financial data presented below provide all adjustments, which include only
normal recurring adjustments, necessary for a fair presentation of the results
of operations for the periods specified. Such results, however, are not
necessarily indicative of the results to be expected for the full fiscal year.
 
<TABLE>
<CAPTION>
                                                                                                              THREE MONTHS ENDED
                                                                       YEAR ENDED MARCH 31,                        JUNE 30,
                                                        ---------------------------------------------------   -------------------
                                                          1993       1994      1995       1996       1997       1996       1997
                                                        --------   --------   -------   --------   --------   --------   --------
                                                                          (IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                                                     <C>        <C>        <C>       <C>        <C>        <C>        <C>
STATEMENT OF OPERATIONS DATA:
Net sales.............................................  $ 70,987   $ 64,242   $72,893   $194,401   $263,209   $ 76,420   $ 76,837
Cost of sales.........................................    76,237     67,648    67,539    119,803    156,277     44,014     47,476
                                                        --------   --------   -------   --------   --------   --------   --------
Gross profit (loss)...................................    (5,250)    (3,406)    5,354     74,598    106,932     32,406     29,361
                                                        --------   --------   -------   --------   --------   --------   --------
Operating expenses:
  Research and development............................     2,499      2,781     3,130      3,803      5,812      1,260      1,902
  Selling, general and administrative.................     4,725      5,115     4,230      7,774     11,803      3,036      3,818
  Recapitalization expenses...........................        --         --        --      4,347         --         --         --
                                                        --------   --------   -------   --------   --------   --------   --------
    Total operating expenses..........................     7,224      7,896     7,360     15,924     17,615      4,296      5,720
                                                        --------   --------   -------   --------   --------   --------   --------
Operating income (loss)...............................   (12,474)   (11,302)   (2,006)    58,674     89,317     28,110     23,641
Interest expense, net.................................     4,806      6,001     6,915      8,578      3,329      1,048      1,685
                                                        --------   --------   -------   --------   --------   --------   --------
Income (loss) before income tax provision (benefit)
  and extraordinary debt extinguishment costs.........   (17,280)   (17,303)   (8,921)    50,096     85,988     27,062     21,956
Income tax provision (benefit)........................      (224)        22        20      2,590     25,400     10,284      6,587
                                                        --------   --------   -------   --------   --------   --------   --------
Net income (loss) before extraordinary debt
  extinguishment costs................................   (17,056)   (17,325)   (8,941)    47,506     60,588     16,778     15,369
Extraordinary debt extinguishment costs, net of income
  taxes...............................................        --         --        --      1,127         --         --         --
                                                        --------   --------   -------   --------   --------   --------   --------
Net income (loss).....................................   (17,056)   (17,325)   (8,941)    46,379     60,588     16,778     15,369
Accretion reversal (accretion) for dividends on
  Mandatorily Redeemable Series A Preferred Stock.....        --         --        --     (1,157)     1,157       (883)        --
                                                        --------   --------   -------   --------   --------   --------   --------
Net income (loss) available for common stockholders...  $(17,056)  $(17,325)  $(8,941)  $ 45,222   $ 61,745   $ 15,895   $ 15,369
                                                        ========   ========   =======   ========   ========   ========   ========
Net income (loss) available for common stockholders
  per share(1)
  Primary.............................................    $(0.49)    $(0.50)   $(0.26)     $1.28      $1.40      $0.36      $0.35
  Fully diluted.......................................    $(0.49)    $(0.50)   $(0.26)     $1.28      $1.35      $0.36      $0.31
Shares used in computing per share amounts(1)
  Primary.............................................    34,822     34,822    34,822     35,224     44,185     44,015     44,121
  Fully diluted.......................................    34,822     34,822    34,822     35,224     46,027     44,015     53,805
</TABLE>
 
<TABLE>
<CAPTION>
                                                                                                               JUNE 30, 1997
                                                                                MARCH 31,                  ---------------------
                                                                    ----------------------------------                     AS
                                                                      1995         1996         1997        ACTUAL      ADJUSTED
                                                                    --------     --------     --------     --------     --------
                                                                                           (IN THOUSANDS)
<S>                                                                 <C>          <C>          <C>          <C>          <C>
BALANCE SHEET DATA:
Working capital (deficit).........................................  $(82,715)    $ 45,899     $ 71,827     $ 61,513     $ 74,903
Total assets......................................................    75,936      165,786      373,389      406,252      419,642
Long-term and senior bank debt, less current portion..............     9,750           --           --           --           --
Subordinated promissory notes payable to stockholders(2)..........        --       47,000           --           --           --
Mandatorily Redeemable Series A Preferred Stock(2)................        --       60,157           --           --           --
5 3/4% Convertible Subordinated Notes due 2004(2).................        --           --      230,000      230,000      230,000
Total stockholders' equity (deficit)..............................   (51,550)      19,524       95,442      111,860      125,250
</TABLE>
 
- ---------------
 
(1) See Note 1 of Notes to the Consolidated Financial Statements included in the
    Company's Annual Report on Form 10-K and incorporated by reference into this
    Prospectus for an explanation of the determination of the number of shares
    used in computing per share amounts.
 
(2) The subordinated promissory notes and Mandatorily Redeemable Series A
    Preferred Stock, which were issued in conjunction with the Company's
    leveraged recapitalization in November 1995, were repaid with a portion of
    the proceeds of the sale of the 5 3/4% Convertible Subordinated Notes due
    2004 in January 1997. See "Management's Discussion and Analysis of Financial
    Condition and Results of Operations -- Leveraged Recapitalization."
 
                                       16
<PAGE>   60
 
                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                 FINANCIAL CONDITION AND RESULTS OF OPERATIONS
 
     This Management's Discussion and Analysis of Financial Condition and
Results of Operations and other parts of this Prospectus contain forward-looking
statements that involve risks and uncertainties. The Company's actual results
may differ significantly from the results discussed in the forward-looking
statements. Factors that might cause such a difference include, but are not
limited to, those discussed under the heading entitled "Risk Factors." The
following discussion of the Company's financial condition and results of
operations should be read in conjunction with the Company's Consolidated
Financial Statements and notes thereto incorporated by reference into this
Prospectus.
 
OVERVIEW
 
     HMT Technology Corporation is an independent supplier of high-performance
thin film disks for high-end, high-capacity hard disk drives, which in turn are
used in high-end PCs, network servers and workstations. HMT was incorporated in
1988 as a subsidiary of Hitachi Metals, Ltd. ("Hitachi Metals") for the purpose
of acquiring certain assets and certain liabilities of the thin film division of
Xidex Corporation, which had been producing thin film disks since 1983. Since
completing the Xidex acquisition, the Company has continued to supply thin film
disks to manufacturers of hard disk drives. Beginning in fiscal 1995, HMT's
management team, many of whom had joined the Company since February 1994,
refocused the strategy and operations of the Company. The new management
concentrated on the 3 1/2-inch disk form factor, focused on the high-end,
high-capacity segment of the disk drive market and expanded the Company's
customer base. In addition, HMT implemented an extensive quality assurance
program, developed proprietary manufacturing processes and optimized production
capacity utilization. These changes resulted in higher production volumes, lower
unit costs, and higher average selling prices primarily associated with new
high-end products. As a result, the Company has increased sales and improved
gross margins, achieving net income of $46.4 million for fiscal 1996 and $60.6
million for fiscal 1997 compared with a net loss of $8.9 million for fiscal
1995.
 
LEVERAGED RECAPITALIZATION
 
     On November 30, 1995 the Company effected a leveraged recapitalization (the
"Leveraged Recapitalization") pursuant to which the Company repurchased from
Hitachi Metals, then the sole stockholder of the Company, all of the outstanding
shares of Common Stock of the Company, and certain investment funds, members of
management and Hitachi Metals purchased Common Stock, Mandatorily Redeemable
Series A Preferred Stock and subordinated promissory notes of the Company. The
Leveraged Recapitalization and related transactions consisted of: (i) the
repurchase by the Company from Hitachi Metals of shares of Common Stock
representing all the outstanding capital stock of the Company for an aggregate
purchase price of $52.1 million in cash; (ii) the recapitalization of the
Company through the issuance of 21,968,057 shares of Common Stock for an
aggregate purchase price of approximately $0.7 million, 5,900,000 shares of
Mandatorily Redeemable Series A Preferred Stock ("Series A Preferred Stock") for
an aggregate purchase price of approximately $59.0 million, $47.0 million of
subordinated promissory notes ("Subordinated Notes") and $60.0 million in senior
debt with associated warrants to purchase 701,344 shares of Common Stock at an
exercise price of $0.0003 per share and (iii) the grant of options to purchase
11,451,865 shares of Common Stock under the 1995 Management Stock Option Plan
and the 1995 Stock Option Plan. The purchasers of the Company's securities in
the Leveraged Recapitalization included certain investment funds affiliated with
Summit Partners, L.P. ("Summit Partners") and certain other investment funds,
the Company's management and employees and Hitachi Metals. The terms of the
Leveraged Recapitalization were determined through negotiations between Hitachi
Metals and Summit Partners, who, prior to the Leveraged Recapitalization, did
not have any affiliation with the Company. Pursuant to these negotiations, the
shares of Common Stock were valued at $0.03 per share. The Series A Preferred
Stock was valued at $10.00 per share, and the Subordinated Notes were valued at
face value. The values of these securities were confirmed by a third party
appraisal. The Leveraged Recapitalization was accounted for as a
recapitalization, and accordingly, no change in the accounting basis of the
Company's assets has been made. As of
 
                                       17
<PAGE>   61
 
November 30, 1995 (immediately prior to the Leveraged Recapitalization), the
Company had $98.5 million in assets and $122.7 million in liabilities.
Immediately following the Leveraged Recapitalization, the Company had $110.9
million in assets, $132.1 million in liabilities (including a $60.0 million
senior bank term loan and $47.0 million of Subordinated Notes) and $59.0 million
of Series A Preferred Stock.
 
     During March and April 1996, the Company sold 9,660,000 shares of Common
Stock at $10.00 per share (including exercise of the underwriters'
over-allotment option) through its initial public offering. The net proceeds
(after underwriter's discounts and commissions and other costs associated with
the initial public offering) totaled $88.7 million. In January 1997, the Company
completed a $230 million private placement of 5 3/4% Convertible Subordinated
Notes due 2004 (the "Convertible Notes") to qualified institutional investors,
resulting in net proceeds of approximately $222.5 million (after offering
costs). Proceeds from the issuance of the Convertible Notes were used to fully
redeem the $59 million of Series A Preferred Stock and to prepay the $47 million
principal balance of the Subordinated Notes issued pursuant to the Leveraged
Recapitalization plus accrued interest and to fully repay $41 million in long-
term borrowings outstanding.
 
     Due to the changes in ownership resulting from the Leveraged
Recapitalization, utilization of net operating losses is limited to
approximately $0.8 million per year over the loss carryforward period (expiring
between 2008 and 2010). The benefit from the net operating losses was recorded
in the quarter ended December 31, 1995. Had the Company been obligated to pay
taxes at the statutory rates for fiscal 1996, net income would have been $30.7
million.
 
RESULTS OF OPERATIONS
 
     The following table sets forth certain operating data as a percentage of
net sales for the periods indicated:
 
<TABLE>
<CAPTION>
                                                                                               THREE MONTHS
                                                           YEAR ENDED MARCH 31,               ENDED JUNE 30,
                                                 -----------------------------------------    --------------
                                                 1993     1994     1995     1996     1997     1996     1997
                                                 -----    -----    -----    -----    -----    -----    -----
<S>                                              <C>      <C>      <C>      <C>      <C>      <C>      <C>
STATEMENT OF OPERATIONS DATA:
Net sales.....................................   100.0%   100.0%   100.0%   100.0%   100.0%   100.0%   100.0%
Cost of sales.................................   107.4    105.3     92.7     61.6     59.4     57.6     61.8
                                                 -------  -------  -------  -------  -------  -------  -------
Gross profit (loss)...........................    (7.4)    (5.3)     7.3     38.4     40.6     42.4     38.2
                                                 -------  -------  -------  -------  -------  -------  -------
Operating expenses:
  Research and development....................     3.5      4.3      4.3      2.0      2.2      1.6      2.5
  Selling, general and administrative.........     6.7      8.0      5.8      4.0      4.5      4.0      4.9
  Recapitalization expenses...................     0.0      0.0      0.0      2.2      0.0      0.0      0.0
                                                 -------  -------  -------  -------  -------  -------  -------
    Total operating expenses..................    10.2     12.3     10.1      8.2      6.7      5.6      7.4
                                                 -------  -------  -------  -------  -------  -------  -------
Operating income (loss).......................   (17.6)   (17.6)    (2.8)    30.2     33.9     36.8     30.8
Interest expense, net.........................     6.7      9.3      9.4      4.4      1.3      1.4      2.2
                                                 -------  -------  -------  -------  -------  -------  -------
Income (loss) before income tax provision
  (benefit) and extraordinary debt
  extinguishment costs........................   (24.3)   (26.9)   (12.2)    25.8     32.6     35.4     28.6
Income tax provision (benefit)................    (0.3)     0.1      0.1      1.3      9.6     13.4      8.6
Extraordinary debt extinguishment costs, net
  of income taxes.............................     0.0      0.0      0.0      0.6      0.0      0.0      0.0
                                                 -------  -------  -------  -------  -------  -------  -------
Net income (loss).............................   (24.0%)  (27.0%)  (12.3%)   23.9%    23.0%    22.0%    20.0%
                                                 =======  =======  =======  =======  =======  =======  =======
</TABLE>
 
     Three Months Ended June 30, 1996 and 1997
 
     Net Sales. Net sales increased 0.5% in the three months ended June 30, 1997
to $76.8 million, representing an increase of $417,000 compared to the three
months ended June 30, 1996. Unit sales volume increased 32.9% during the three
months ended June 30, 1997, while average selling prices declined 26.3%,
compared to the three months ended June 30, 1996. The increase in unit sales
volume
 
                                       18
<PAGE>   62
 
during the three months ended June 30, 1997 was primarily attributable to an
increase in manufacturing capacity, as a result of the Company's facility
expansion and the installation of additional sputtering lines. Five additional
sputtering lines were brought into service during the nine months ended March
31, 1997 and two were brought into service during the three months ended June
30, 1997. Improved utilization of existing capacity, as well as improved
manufacturing processes, also contributed to higher production volume and unit
shipments. The ability to increase revenue will depend upon an increase in
overall unit production volume.
 
     During the three months ended June 30, 1997, three customers individually
accounted for at least ten percent of consolidated net sales: Iomega (32.1%),
Samsung (27.7%), and Western Digital (18.7%). During the three months ended June
30, 1996, three customers accounted for at least ten percent of consolidated net
sales: Maxtor (43.3%), Western Digital (17.5%) and Iomega (15.6%). The Company
expects that it will continue to derive a substantial portion of its sales from
a relatively small number of customers, although the identity of such customers
may change from period to period.
 
     Gross Profit. Gross margin was 38.2% for the three months ended June 30,
1997, compared with 42.4% for the three months ended June 30, 1996. The decline
in gross margin during the three months ended June 30, 1997 was a result of the
26.3% decline in average selling prices versus the comparable period in fiscal
1997, offset in part by decreased unit production costs, improved utilization of
manufacturing capacity, improved manufacturing processes, and the absorption of
fixed costs over higher unit production volume. Production of substrates at the
Eugene, Oregon manufacturing facility (which was acquired during the three
months ended June 30, 1996) and lower substrate and other raw material prices
also contributed to decreases in unit costs in the three months ended June 30,
1997 compared to the same three month period in fiscal 1997.
 
     Research and Development. Research and development expenses increased
$642,000 in the three months ended June 30, 1997, compared to the same period in
1996. Research and development expenses increased primarily due to an increase
in headcount related to the Company's new product introductions and expanded
research efforts to support the Company's overall capacity expansion.
 
     Selling, General and Administrative. Selling, general and administrative
expenses increased $782,000 in the three months ended June 30, 1997, compared to
the same period in the prior fiscal year. The increase in selling, general and
administrative expenses primarily reflected the increased headcount necessary to
support higher production volume and unit shipments. The Company anticipates
that operating expenses will continue to increase in absolute dollars as
headcount is increased to support new product introductions, and anticipated
higher levels of production volume and unit shipments, although, as a percentage
of net sales, operating expenses may fluctuate from period to period.
 
     Interest Expense, Net. Net interest expense increased $637,000 during the
three months ended June 30, 1997, compared to the same period in fiscal 1997, a
result of the increased debt balance, partially offset by $1.4 million in
interest that was capitalized during the same period.
 
     Provision for Income Taxes. For the three months ended June 30, 1997, the
Company recorded income taxes at its estimated annual effective tax rate of 30%.
During the three months ended June 30, 1996, income taxes were recorded at a
rate of 38%, reflecting the estimated annual rate at that time.
 
     Fiscal Years Ended March 31, 1995, 1996 and 1997
 
     Net Sales. Net sales were $72.9 million in fiscal 1995, $194.4 million in
fiscal 1996, and $263.2 million in fiscal 1997. This represented an increase of
166.6% from fiscal 1995 to fiscal 1996, and an increase of 35.4% from fiscal
1996 to fiscal 1997. The increase in net sales in fiscal 1996 compared to fiscal
1995 was primarily attributable to an increase in manufacturing capacity,
primarily from improved utilization of existing capacity, improved manufacturing
processes, and increased yields, resulting in higher production volume and unit
shipments, as well as higher average selling prices primarily associated with
the sale of new high-end products. The increase in net sales in fiscal 1997 was
primarily attributable to an increase in manufacturing capacity, resulting from
the addition of new sputtering lines,
 
                                       19
<PAGE>   63
 
and improved utilization of existing capacity and improved manufacturing
processes, resulting in higher production volume and unit shipments. The unit
sales volume increased 104% from fiscal 1995 to fiscal 1996 and 60% from fiscal
1996 to fiscal 1997 while average selling prices increased 31% and decreased 16%
over the same periods, respectively. The Company anticipates that average
selling prices will fluctuate with industry supply and demand. Substantially all
of the Company's net sales consist of products delivered to customers in Asia,
primarily foreign subsidiaries of U.S. companies.
 
     Gross Profit. Gross margin was 7.3% in fiscal 1995, 38.4% in fiscal 1996
and 40.6% in fiscal 1997. Increased yields in fiscal 1996, and a manufacturing
disruption experienced during the last quarter of fiscal 1995 helped contribute
to improved margins in fiscal 1996 compared to fiscal 1995. The increases in
gross margin in fiscal 1996 and fiscal 1997 were primarily a result of decreased
unit production costs, improved utilization of manufacturing capacity, improved
manufacturing processes, and the absorption of fixed costs over higher unit
production volume. Production of aluminum and nickel plated substrates at the
Eugene, Oregon manufacturing facility (which was acquired during the first
quarter of fiscal 1997) and lower substrate and other raw material prices also
contributed to a decrease in unit cost during fiscal 1997.
 
     Research and Development. Research and development expenses were $3.1
million, or 4.3% of net sales, in fiscal 1995, $3.8 million, or 2.0% of net
sales, in fiscal 1996, and $5.8 million, or 2.2% of net sales, in fiscal 1997.
Research and development expenses increased in absolute dollars in fiscal 1996
and fiscal 1997 due to an increase in headcount related to the Company's new
product introductions, as well as increased efforts to expand research and to
provide enabling technology elements for advanced products. The decrease of
research and development expenses as a percentage of net sales in fiscal 1996
was primarily a result of the substantial increase in net sales over the same
period. The Company develops manufacturing processes for new products directly
on active production lines during the research and development phase, avoiding
the need for substantial capital investment in dedicated research equipment. The
Company anticipates that research and development expenses will increase in
absolute dollars in future periods, although as a percentage of net sales,
research and development expenses may fluctuate.
 
     Selling, General and Administrative. Selling, general and administrative
expenses were $4.2 million, or 5.8% of net sales, in fiscal 1995, $7.8 million,
or 4.0% of net sales, in fiscal 1996 and $11.8 million, or 4.5% of net sales, in
fiscal 1997. The fiscal 1996 and fiscal 1997 increase in selling, general and
administrative expenses in absolute dollars primarily reflected increased
headcount necessary to support higher production volume and unit shipments. The
fiscal 1996 decline in selling, general and administrative expenses as a
percentage of net sales primarily reflected the increase in net sales over the
same period, partially offset by an increase in the selling, general and
administrative expenses in absolute dollars. The Company anticipates that
selling, general and administrative expenses will continue to increase in
absolute dollars as headcount is increased to support anticipated higher levels
of production volume, although as a percentage of net sales, selling general and
administrative expenses may fluctuate from period to period.
 
     Recapitalization Expenses. The Company effected the Leveraged
Recapitalization on November 30, 1995, and recorded a $4.3 million charge for
related expenses for the quarter ended December 31, 1995.
 
     Interest Expense, Net. Interest expense, net was $6.9 million, or 9.4% of
net sales, in fiscal 1995, $8.6 million, or 4.4% of net sales, in fiscal 1996
and $3.3 million, or 1.3% of net sales, in fiscal 1997. The fiscal 1996 increase
in absolute dollars was primarily a result of higher average debt balances and
interest rates, as compared to fiscal 1995. The fiscal 1997 decrease was
primarily a result of interest earned on excess cash balances, lower average
debt balances and a $2.4 million increase in capitalized interest. The Company
anticipates interest expense, net will increase in absolute dollars as a result
of higher average debt balances (a result of the completion of the sale of the
Convertible Notes in January 1997), lower invested cash balances and lower
capitalized interest as construction-in-progress balances decrease.
 
                                       20
<PAGE>   64
 
     Provision for Income Taxes. The Company recorded income tax provisions of
$20,000, $2.6 million and $25.4 million in fiscal 1995, 1996 and 1997,
respectively.
 
     Due to a loss in fiscal 1995, the Company required no federal income tax
provision. The income tax provision recorded during fiscal 1995 was based upon
state income taxes of Hitachi Metals allocated to the Company. During fiscal
1996, the Company assessed the recoverability of deferred tax assets and, based
on expectations about operating results for the fiscal year ending March 31,
1997 and future years, determined it was more likely than not that the entire
balance of deferred tax assets would be recovered. As the facts that supported
the reduction of the valuation allowance related to the period immediately
following the Leveraged Recapitalization, the Company reduced its fiscal 1996
income tax expense by approximately $6.9 million to reflect the tax benefit
associated with recognition of deferred tax assets at December 31, 1995. The
recognition of deferred tax assets and the utilization of $12.7 million of net
operating loss carryforwards produced an effective tax rate of 5.2% for fiscal
1996.
 
     The fiscal 1997 tax rate of approximately 30% reflected statutory federal
and state rates, reduced primarily by benefits realized from the establishment
of a foreign sales corporation, utilization of state credits and implementation
of other state tax planning strategies.
 
     Extraordinary debt extinguishment costs, net of income taxes. The Company
repaid the balance of a senior bank term loan incurred in connection with the
Leveraged Recapitalization on March 14, 1996, after completion of its initial
public offering. As a result, the Company recorded a one-time non-cash charge of
$1.1 million, net of income taxes, for the write-off of the portion of
unamortized debt issue costs related to the senior bank term loan during fiscal
1996.
 
     Recent Pronouncements
 
     During February 1997, the Financial Accounting Standards Board issued
Statement No. 128, "Earnings per Share" (SFAS No. 128) which establishes
standards for computing and presenting earnings per share (EPS) more comparable
to international EPS standards. It replaces the presentation of primary EPS with
a presentation of basic EPS. It also requires dual presentation of basic and
diluted EPS on the face of the income statement for all entities with complex
capital structures and requires a reconciliation of the numerator and
denominator of the basic EPS computation to the numerator and denominator of the
diluted EPS computation. While the Company studies the impact of the
pronouncement, it continues to calculate EPS based on Accounting Pronouncements
Board Opinion No. 15, "Earnings per Share." SFAS No. 128 will be effective for
the Company's 1998 fiscal year, including interim periods, with a restatement of
all prior-period EPS data presented.
 
LIQUIDITY AND CAPITAL RESOURCES
 
     In fiscal 1995, the Company financed its cash requirements primarily
through cash from operations. During fiscal 1996 and fiscal 1997 and the three
months ended June 30, 1997, the Company financed its cash requirements through
cash from financing activities and operations.
 
     The Company's operations provided net cash of $8.7 million, $50.4 million,
$90.7 million and $30.9 million for fiscal 1995, 1996 and 1997 and for the three
months ended June 30, 1997, respectively. Cash generated during fiscal 1997
reflected net income plus depreciation and amortization, an increase in total
liabilities, and the utilization of deferred tax assets, partially offset by
increases in inventories and receivables. Increased sales and improved margins
contributed to the positive cash flow provided by operations in each of the past
two fiscal years. Cash generated during the three months ended June 30, 1997
reflected net income plus depreciation and amortization, as well as an increase
in accounts payable and current and long-term liabilities, partially offset by
increases in receivables and inventories.
 
     For fiscal 1996 and fiscal 1997 and for the three months ended June 30,
1997, net cash used in investing activities was $35.5 million, $208.2 million
and $37.8 million, respectively. The Company invested $39.6 million, $197.4
million and $39.8 million in property, plant and equipment during fiscal 1996
and fiscal 1997 and for the three months ended June 30, 1997, respectively.
 
                                       21
<PAGE>   65
 
     During fiscal 1996 and fiscal 1997 and for the three months ended June 30,
1997, net cash from financing activities was $20.0 million, $125.9 million and
$4,000, respectively. Cash provided by financing activities for fiscal 1997
reflects the issuance of $230.0 million in Convertible Notes, and the related
redemption of $59.0 million in Series A Preferred Stock, prepayment of the $47.0
million in Subordinated Notes, and repayment of $41.0 million in long-term
borrowings, as well as the receipt of $11.7 million from the exercise of the
underwriters' over-allotment option pursuant to the Company's initial public
offering.
 
     As of June 30, 1997, the Company's principal sources of liquidity consisted
of $46.4 million in cash, cash equivalents and short-term investments, and a
$50.0 million unsecured revolving credit facility under which there were no
borrowings. At June 30, 1997, the Company had indebtedness of $230.0 million in
Convertible Notes, that require semi-annual interest payments beginning July 15,
1997. The Company expects to spend in excess of $200 million on capital
expenditures directed toward expansion of production capacity over the next
twelve months.
 
     The Company believes existing cash balances, cash generated from
operations, and funds available under its credit facility will provide adequate
cash to fund its operations for at least the next twelve months. The Company
expects to have significant future obligations and expects that it may require
additional capital to support continued expansion of the Company's manufacturing
capacity and growth, if any. Additional sources of long-term liquidity could
include cash generated from operations and debt and equity financings. There can
be no assurance that the Company will be able to obtain alternative sources of
financing on favorable terms, if at all, at such time or times as the Company
may require such capital.
 
                                       22
<PAGE>   66
 
                                    BUSINESS
 
     This Prospectus contains forward-looking statements which involve risks and
uncertainties. The Company's actual results may differ significantly from the
results discussed in the forward-looking statements. Factors that might cause
such a difference include, but are not limited to, those discussed in "Risk
Factors."
 
     HMT is an independent supplier of high-performance thin film disks for
high-end, high-capacity hard disk drives, which in turn are used in high-end
personal computers ("PCs"), network servers and workstations. The disks
currently being shipped by the Company are primarily for disk drives with
storage capacities ranging from 2.0 to 10.0 gigabytes (using two to 12 disks),
and substantially all have coercivity levels of 2000 Oe or higher. The Company
also supplies high-performance thin film disks for removable hard disk drives.
Since March 1994, the Company has focused on addressing the needs of this
high-end, high-capacity segment of the disk drive market. HMT believes that its
recent operating results reflect its success in meeting these needs and that its
future growth and success depend on its ability to continue to develop and
market products that enable its customers to produce high-performance disk
drives for high-end data storage applications. The Company provides a range of
magnetic density points (coercivities), glide heights and disk thicknesses to
match the design and performance requirements of each particular customer. The
Company's principal customers currently include Maxtor, Samsung, Iomega, Western
Digital, Micropolis and Quantum.
 
INDUSTRY BACKGROUND
 
     The Disk Drive Market
 
     Market demand for disks and disk drives has been growing steadily,
stimulated by demand for new computers, upgrades to existing computers and the
growing use of sophisticated network servers. The introduction of increasingly
powerful microprocessors and more memory intensive software, combined with the
development and growth of multimedia computing applications and Internet usage,
have stimulated demand for PCs in both the home and business markets. According
to International Data Corporation ("IDC"), worldwide shipments of PCs were 59
million units in 1995 and 69 million units in 1996, and are projected to reach
approximately 117 million units in 2000. In addition, the PC server market,
driven by the trend toward networking applications and the expansion of the
Internet, is expected to grow substantially through the year 2000.
 
     The combined demand from the PC and PC server markets has resulted in
strong growth in unit shipments of disk drives. According to IDC, worldwide
shipments of hard disk drives were 105 million units in 1996 and are projected
to be 132 million units in 1997 and 223 million units in 2000. According to
Trend Focus, the worldwide market for hard disk drives was approximately $24
billion in 1996. Strong overall demand for disk drives has also stimulated the
growth of the thin film disk market. According to Trend Focus, there were 340
million thin film disks produced in 1996 with an estimated market value of $4.0
billion. Trend Focus projects that the total market for thin film disks will
reach 725 million units in 2000, with an estimated market value of $7.9 billion.
 
     The applications being developed for PCs require greater storage capacity
and, as a result, have sharply increased the demand for high-capacity disk
drives. Users purchasing newer PCs for business and home use are commonly
attracted by the availability of greater processing power, larger databases,
multimedia and other memory intensive applications and more sophisticated
operating systems, such as Windows 95 or Windows NT. Increasing use of the
Internet and on-line data, including image storage and retrieval, have further
stimulated the demand for storage capacity. The disk drive industry has
responded to this demand with significant technology and product advances. As a
result, mean storage capacity per disk drive has increased from 213 megabytes
("MB") in 1993 to 690 MB in 1995 to 2.7 GB in 1997. Meanwhile, the average
number of disks per drive has remained relatively constant at about 2.5 disks.
While storage capacity has grown, the cost per MB has fallen from $1.26 in 1993
to $0.32 in 1995 and to $0.10 in 1997. Today's market continues to generate
pressure for advances to facilitate these trends in computing, especially at the
high-end. Thus, the Company believes that success in the disk drive market
 
                                       23
<PAGE>   67
 
has depended and for the foreseeable future will depend on the ability of the
disk drive manufacturer, together with its suppliers of critical components,
such as thin film disks, to keep pace with these advances.
 
     Additionally, removable-media storage devices, including removable hard
disk drives, have received increased attention in the data storage market.
Removable hard disk drives utilize cartridges incorporating thin film disks and
combine the high-capacity and rapid access of hard disk drives with the benefits
of removability. These devices can be used peripherally to increase the storage
capacity for PCs.
 
     Disk Drive Technology
 
     The basic elements of the disk drive, sized to fit various industry form
factors, have remained essentially the same since hard disk drives were first
introduced. The principal components of a hard disk drive are disks, heads,
spindle and actuator mechanics and electronics. Each disk drive typically
contains from one to ten disks that are attached to a spindle/motor assembly
within a sealed enclosure. The electronics control the spinning of the disk, the
positioning of the head and the writing and retrieval of data stored on the
disk. The recording head is a small magnetic transducer that, when the disk is
spinning, "flies" just above the disk surface. Data are written on
circumferential tracks on the disk when the electronic channel sends current
pulses to the head. The head converts these pulses to magnetic fields that cause
the magnetic layer within the disk and under the recording head to become
magnetized, oriented in the direction of the head's magnetic field. Reversing
the current in the head reverses the direction of the magnetic field on the
disk. During the read-back process, as the head scans over the disk, magnetic
flux from the disk's magnetic layer is picked up by the head and induces an
electrical current which is converted into voltage. The output signal voltage is
then transformed into digital data by the read channel electronics. The
following diagram illustrates the principal components of a typical hard disk
drive:

[Diagram of typical hard disk drive with arrows indentifying key components:
disks, spindle, recording head, and electronics.] 

     Major improvements in disk drive performance have been based on
technological advances in the principal components. In a typical disk drive
today, the spindle/motor assembly rotates the disk at 5,200 to 10,000
revolutions per minute. The head reads and writes data onto the spinning disk
while flying at a height of 0.7 to 1.7 microinches (0.018 to 0.04 micron) at
data transfer rates of 70 to 130 megabits per second. The combination of modern
head and disk technologies enables this drive to store data on 5,000 to 8,000
circumferential tracks per radial inch on the disk with 100,000 to 160,000 bits
of data per inch along each track.
 
     Thin Film Disk Technology
 
     A thin film disk is composed of a substrate, generally aluminum, coated
with thin films capable of storing information in the form of magnetic patterns.
The manufacturing of thin film disks is a multi-step process using processes
similar to those used for the production of silicon wafers for semiconductors.
The manufacturing process involves the deposition of extremely thin, uniform
layers of magnetic film onto a substrate using a sputtering process, by either a
static or in-line system, similar to that used to coat
 
                                       24
<PAGE>   68
 
silicon wafers. The basic process consists of many interrelated steps and
requires an extremely clean environment. Minor deviations in the manufacturing
process, minute impurities in materials used, particulate contamination or other
problems can cause significant numbers of disks to be rejected, thereby causing
significant yield loss.
 
     The most significant technological challenges facing disk manufacturers
today are associated with market demand for increased storage capacity and
durability. An effective implementation of thin film technology to meet these
challenges must address various performance-related characteristics, including
magnetics, glide height, durability and static friction ("stiction").
 
     - Magnetics. Coercivity, a measure of the magnetic strength of the disk, is
       expressed in Oersted ("Oe"). The coercivity of the disk is determined by
       the types of disk substrate and thin film materials used, substrate
       surface conditions before disk sputtering, and the conditions that exist
       during the sputtering process, including temperature, vacuum and possible
       sources of disk contamination. As areal density increases, higher
       coercivity is needed to permit sharper transitions between magnetized
       regions. This allows each bit of data to be stored in a smaller area, and
       therefore more data can be stored in the same disk area. Advanced drive
       designs currently require coercivities in the range of 2000 to 2400 Oe,
       compared to a range of 950 to 1200 Oe seven years ago. The Company
       believes that most high-end disk drive manufacturers will require
       coercivities of 2400 Oe and above by the end of 1997. HMT currently
       manufactures and sells disks in commercial quantities with coercivities
       ranging from 2000 to 2400 Oe, with more than 50% of the Company's
       revenues during the three months ended March 31, 1997 deriving from disks
       with coercivities of 2200 Oe and above. The Company is also currently
       producing small quantities of disks for use in customer development
       programs with coercivities of up to 3000 Oe.
 
     - Glide Height. The glide height of the disk is the measure of the height
       at which the head can fly over the disk without hitting anything and is a
       standard used in the specification of the disk. The actual flying height
       of the head in the disk drive is higher than the glide height to provide
       a margin for safety. Glide height depends on the smoothness and flatness
       of the disk surface. The lower the disk head flies above the disk
       surface, the more accurately the head can read the magnetic signal,
       allowing a smaller magnetized region to store each bit of data and
       thereby contributing to increases in areal density. While the current
       industry standard glide height is 1.5 microinches, the Company expects
       that glide heights will decrease to 1.0 microinch by the end of 1997. The
       Company currently manufactures and sells disks in commercial quantities
       with glide heights of 1.5 microinches to 1.0 microinch.
 
     - Durability Through Start/Stop Cycles. In most hard disk drives, the head
       and disk come into contact when the disk drive is turned off and the head
       rests directly on the inner diameter of the disk. To prevent wear on the
       disk, a protective overcoat is deposited over the magnetic layer of the
       disk. However, the thickness of this overcoat must be minimized because
       this layer increases the distance of the head from the magnetic layer,
       thereby reducing the strength of the magnetic signal reaching the head.
       Customer specifications typically require 60,000 start/stop cycles for
       desktop PCs.
 
     - Stiction. Stiction is the static friction that occurs when two smooth
       surfaces come into contact. In the case of hard disk drives, an extremely
       smooth disk surface enables lower glide heights and can enhance
       durability by reducing the friction which occurs when the head contacts
       the disk. However, if a disk is too smooth, stiction will cause the head
       to adhere to the disk surface when the drive is turned on and off,
       causing irreparable damage to the hard disk drive. Disk manufacturers
       minimize this problem primarily through texturizing the disk surface in a
       controlled manner.
 
     Disk manufacturers cannot simply address each performance characteristic
discretely because the interplay among characteristics significantly impacts the
overall performance of the disk. For example, a protective overcoat that yields
a highly durable disk may well reduce the disk's potential storage capacity.
 
                                       25
<PAGE>   69
 
     Challenges Facing the Disk Drive Industry
 
     Despite technological advances in components, including thin film disks,
and the prospects for continued data storage market growth, disk drive
manufacturers face a demanding marketplace. A strong competitive position is
best achieved through continual innovation. Improvements in product performance
characteristics, designed to meet the growing demands for increased storage
capacity, play an integral part in allowing the manufacturer to generate
acceptable gross margins. However, in the highly competitive disk drive
industry, other manufacturers have generally been able to develop comparable
products within a relatively short time. The likelihood of rapidly decreasing
profitability over the life cycle of any given product provides a strong
incentive for manufacturers to innovate. This results in extremely short product
cycles, currently estimated to be from nine to twelve months.
 
     Disk drive manufacturers participating in the high-end, high-capacity disk
drive market segment can realize higher gross margins by successfully addressing
the need for drives capable of supporting today's demand for high-performance,
value-added computing products. In this segment, which supplies products
incorporated into high-end PCs, network servers and workstations, users are less
price sensitive than typical home PC consumers because they have a more
compelling need for a value-added product. Because of the short product cycles
and the significant technology improvements incorporated into each new
generation of high performance disk drives, the need to be in the forefront of
technological advances is particularly great for companies competing in this
segment.
 
     Disk drive manufacturers can produce higher capacity products by putting
more disks in a drive or coupling a number of drives together in an array. These
approaches are limited by form factor constraints and technical complexity.
These are also relatively high cost solutions since the drive manufacturer is
adding more componentry. A more cost-effective solution is to develop a product
that can store more data using the same number of components. Thus, disk drive
manufacturers generally have relied on the development of new head technologies
and of thin film disks with improved areal density characteristics to support
generational advances in storage capacity and performance.
 
THE HMT APPROACH
 
     HMT focuses on providing value-added technological solutions that meet the
demands of the high-end, high-capacity disk drive market. The Company develops,
manufactures and sells technologically advanced products designed to provide
improved performance, principally through achieving higher coercivities and
lower glide heights. The Company seeks to be a supplier to disk drive
manufacturers with a proven record for technological leadership because these
customers have the greatest ability to fully exploit the value of
technologically superior disks. By working with such high-end customers and
their head vendors, HMT can influence leading edge disk drive designs and earn a
strong position as a supplier of disks for these products.
 
STRATEGY
 
     The key elements of HMT's strategy are as follows:
 
     -  Establish and Maintain Leadership in High-End Product Technology. The
        Company focuses its development resources principally on performance
        improvements for disks sold to the high-end, high-capacity segment of
        the disk drive industry. In order to improve product performance
        characteristics, including magnetics, glide height, durability and
        stiction, HMT is continually engaged in efforts to enhance its
        proprietary technologies and processes. For example, efforts in the
        alloy and process development area, focusing largely on non-precious
        metal alloys, are directed toward improving disk coercivity above the
        3000 Oe level.
 
     -  Develop Collaborative Relationships with Leading Head and Disk Drive
        Manufacturers. The Company works closely with head manufacturers
        developing new technologies, including TRI-PAD compatible and MR-head
        ready disks. This collaboration enables the parties to develop
        compatible products that can be effectively incorporated together into
        leading edge disk drives.
 
                                       26
<PAGE>   70
 
        HMT also seeks to establish strong relationships with its customers,
        enabling the Company to participate in establishing technological and
        design requirements for new products. The Company believes that close
        technical collaboration with its customers and their other suppliers
        during the design phase of new disk drives facilitates integration of
        the Company's products into new drives, improves the Company's ability
        to reach cost effective high volume manufacturing rapidly and enhances
        the likelihood that the Company will become a primary supplier of thin
        film disks for high-performance disk drive products.
 
     -  Develop Advanced Manufacturing Processes to Support Volume
        Production. HMT develops advanced manufacturing processes directly on
        state-of-the-art production equipment. Developing manufacturing
        processes for new products directly on active production lines during
        the research and development phase increases the likelihood that the
        Company can quickly and efficiently transition to high volume commercial
        production of new products. The ability to implement new processes
        quickly also helps the Company meet its customers' increasingly rapid
        time-to-market demands and advances its goal of having its products
        designed into its customers' disk drives.
 
     -  Expand Manufacturing Capacity. The Company recently completed
        construction of a new 124,000 square foot production facility at its
        Fremont, California site. The administrative office areas and six
        production scale sputtering lines were brought into service by the end
        of the first quarter of fiscal 1998. The Company plans to install up to
        10 additional production scale sputtering lines in this new facility. In
        addition, the Company completed an expansion of its facility in Eugene,
        Oregon during fiscal 1997, where it produces aluminum substrates and
        nickel-plated and polished substrates. The Company expects that added
        capacity will enable it to improve its ability to meet the demands of
        current customers and position it to take advantage of additional market
        opportunities.
 
     -  Maintain Strict Quality Control of Manufacturing Process. HMT believes
        that its close attention to quality control results in a consistent
        product and high production yields and is key to its success. Attention
        to quality has the dual benefit of producing high-performance disks and
        lowering the Company's cost of production. In addition, product quality
        is an essential factor in the supplier certification process of disk
        drive manufacturers.
 
PRODUCTS
 
     The Company provides a range of magnetic density points (coercivities),
glide heights and disk thicknesses. HMT currently manufactures and sells disks
in commercial quantities with substantially all having coercivities levels of
2000 Oe or higher and glide heights of 1.5 microinches or less. The Company is
also currently producing small quantities of disks for use in customer
development programs with coercivities of up to 3000 Oe.
 
     The Company's product mix continually shifts as technological advances are
implemented in anticipation of demand for disks with improved performance
characteristics and the Company transitions production from less technologically
sophisticated disks still in active use. For example, during the three months
ended March 31, 1995, 1800 Oe and below products comprised 95.0% of total units
shipped. In the three months ended March 31, 1997, substantially all products
shipped were 2000 Oe and above, with more than 50% of the units shipped having
coercivities of 2200 Oe and above.
 
     As of June 30, 1997, the Company's disks were used by seven disk drive
manufacturers in 11 different 3 1/2-inch disk drive products. Currently, the
Company's products are used in fixed disk drives that have capacities ranging
from 2.0 GB to 10.0 GB with storage capacity per disk ranging from 750 MB to 1.5
GB and removable disk drives that have capacities of approximately 1.0 GB with
storage capacity per disk of approximately 500 MB. The Company has the
technological capability to produce disks to fit standard form factors of
5 1/4-inches and below, although it currently produces only 3 1/2-inch disks.
 
                                       27
<PAGE>   71
 
MANUFACTURING AND QUALITY
 
     HMT believes that its internally developed proprietary and patented
manufacturing processes and state-of-the-art equipment, to which it has made
proprietary modifications, combined with its extensive expertise, currently
provide HMT with a technological advantage over competing independent thin film
disk manufacturers. HMT's expertise, processes and equipment also allow it to
develop new proprietary processes in response to customers' requirements for
improved product performance and to integrate new technologies into the
manufacturing process rapidly. The Company's production lines can be installed,
modified or expanded on a cost efficient basis. The use of a modular strategy
facilitates incremental capacity increases, efficient adaptation of
manufacturing equipment for new product processes and achievement of high volume
manufacturing capacity for new products on a timely basis.
 
     Manufacturing Process
 
     The Company's manufacturing process is briefly summarized as follows:
 
     Chamfer, Grind, Bake and Wash. The initial input to the production of a
thin film disk is an aluminum blank that can be procured from a number of
sources. To create specialized aluminum alloy substrates, HMT chamfers the inner
and outer edges of the blank, and bakes the chamfered blank to bring out surface
roughness. HMT then grinds the blank to achieve required gauge thickness and
flatness, remove surface defects, and improve surface finish. HMT then washes
the blank to remove particles. HMT currently produces these substrates through
in-house manufacturing, but may from time to time purchase a portion of its
requirements from independent vendors.
 
     Plate, Polish, Texture and Wash. Aluminum substrates are plated with
electroless Nickel-Phosphorus alloy, a non-magnetic layer critical to corrosion
resistance that strengthens the disk and improves durability. The Company
currently performs most of its nickel plating in-house. Disks are then polished
to produce a mirror smooth surface. Polishing enhances the nickel surface,
reducing its roughness, while maintaining the overall flatness of the disk. The
Company's texturizing process, a highly automated patented process, produces a
controlled roughness on the disk's surface to improve its stiction
characteristics. The final step in these front-end processes is washing to
present a clean disk surface. Subsequent processes occur in class 10 clean rooms
only.
 
     Sputter, Dip Lube and Kiss Buff. The sputter process uses equipment and a
process, similar to that used in silicon wafer fabrication, in which layers of
materials are deposited on the disk through a vacuum sputtering process. The
chrome and magnetic layers determine the magnetic properties of the disk. The
carbon layer is a protective overcoat. After sputtering, a microscopic layer of
lubrication is applied to the disk's surface to improve durability and reduce
surface friction. After lubrication, a surface finishing step is applied,
commonly referred to as kiss buff or tape burnish.
 
     Glide/Certify. In the test and certification process each finished disk is
electronically screened and certified as acceptable based on the customer's
specifications. A robotically controlled tester electronically tests for glide
performance. The tester then writes information onto the disk, reads it back and
erases it, simulating performance in the customer's disk drive. Each disk is
tested for parametrics, errors in the read/erase process and surface defects.
 
     The conversion of a specialized aluminum alloy substrate into a final
product requires three to five days.
 
                                       28
<PAGE>   72
 
THE THIN FILM DISK PRODUCTION PROCESS 


[Diagram--A flow draft summarizing the principal steps in the process flow and
the corresponding disk layers created during the thin film disk production
process.]


 
     Quality Assurance
 
     HMT has a dedicated quality assurance group. The Company believes that its
quality assurance program allows it to realize superior product yields and
consistently produce a quality product. Because a high quality product is
critical to achieving strong operating results and high customer satisfaction,
HMT's emphasis on this area will remain a top priority. The organization
consists of four separate groups:
 
     - Application Engineering. The Application Engineering group is responsible
       for reviewing customer requirements and specifications by conducting
       specification reviews and soliciting customer and internal manufacturing
       feedback. Other functions include correlating and evaluating the results
       of HMT and customer testing, generating standards and performing source
       audits.
 
                                       29
<PAGE>   73
 
     - Supplier Quality Engineering. Because quality assurance is a critical
       aspect of the Company's strategy, the emphasis on quality must extend to
       the supplier level. The Supplier Quality
       Engineering group is responsible for ensuring incoming product quality
       through auditing suppliers, reviewing process data, establishing internal
       specifications and creating quality procedures and practices. The group
       also establishes material specifications, supplier benchmarking and
       standards for qualification of the supplier base.
 
     - Reliability and Process Engineering. The Reliability and Process
       Engineering group is responsible for performing ongoing reliability
       testing, process improvement testing and new product development testing.
       Specific functions involve statistical process control analysis, gauge
       repeatability and reproducibility studies, equipment calibration, process
       qualification improvements and in-process quality audits.
 
     - Customer Support. The Customer Support group acts as liaison between the
       customer and the Company's manufacturing organization. All customer
       concerns and issues are handled through the group. Other responsibilities
       include corrective action requests, non-conforming material reviews,
       return material authorizations and document control.
 
     Manufacturing Facilities and Capacity
 
     The Company's manufacturing facilities, distribution center and
administrative offices are located in Fremont, California. The Company's Fremont
facility received ISO 9001 certification in May 1996. As of June 30, 1997, the
Company was operating 18 production scale sputtering lines seven days a week, 24
hours per day for production and development of products. A typical sputtering
line consists of one sputtering machine and associated equipment, such as
texturizers, lubricators, glide testers and certifiers. The Company recently
completed construction of a 124,000 square foot production facility at its
Fremont, California site, in which six of its sputtering lines are located. The
Company plans to install up to 10 additional production scale sputtering lines
in this facility. In addition, the Company completed an expansion of its
facility in Eugene, Oregon during fiscal 1997, where it produces aluminum
substrates and nickel-plated and polished substrates.
 
     Because the Company has been operating at close to full capacity, further
growth in the Company's net sales will depend on the continued successful
expansion by the Company of its manufacturing capacity. There can be no
assurance that the Company will be able to successfully increase capacity and
the failure to do so could have a material adverse effect of the Company's
business, operating results and financial condition.
 
TECHNOLOGY
 
     The Company believes that there are a number of factors that are key to
establishing and maintaining an advanced technology position. The Company is
optimizing non-precious metal alloys, based on a cobalt/chromium/tantalum alloy,
for future products with coercivities that can support foreseeable demand for
increased storage capacity using relatively inexpensive materials. The Company
also has extensive expertise in the deposition of these and other alloys onto
disks. The Company uses state-of-the-art static sputtering machines in the
development and production of disks. Static machines differ from in-line, pallet
machines used by some other disk manufacturers in a number of important
respects. Static sputtering machines process one stationary disk at a time,
allowing for greater control of alloy deposition and minimizing spatial and
temperature variation; use isolated process chambers, permitting the
manufacturer to control and optimize each process step separately; and do not
require a pallet, reducing the risk of contamination of the disk surface during
processing. The Company has further enhanced the performance of sputtering
equipment supplied by vendors through internally developed, proprietary and
patented modifications.
 
     The Company believes its unique tribology approach, which minimizes
detrimental interaction between the head and disk, is another area of strength.
The method involves balancing the inter-relationship between texturizing, carbon
overcoating and lubrication. The Company's patented graded
 
                                       30
<PAGE>   74
 
zone texture process allows the Company to produce a rougher texture at the
disk's inner diameter, while creating a smoother surface on the remainder of the
disk. This process provides increased protection where the head most often comes
into contact with the disk, while also minimizing the distance between the head
and the disk magnetics in other regions of the disk where data is stored and
read. A nitrogen-containing carbon overcoat offers superior wear resistance.
Application of the Company's in-house blended lubricant results in disks that
can withstand an extreme range of temperature and humidity conditions. These
additional layers must be thick enough to achieve the desired protection of the
disk and thin enough to minimize the distance between the head and the magnetic
layer of the disk. The Company believes that its application of these
technologies, with particular attention to the inter-relationship between the
technologies and their combined effect on disk performance, have enabled it to
develop competitive high-capacity disks.
 
     The Company also devotes considerable resources to developing disks for
drives utilizing new head technology. Head technology, traditionally based on
flying inductive heads that combine the read and write function within one head,
is undergoing significant evolution. Two important new technologies, proximity
recording and MR-heads, have emerged and over time are expected to replace
traditional inductive technology. The Company believes that proximity recording,
such as TRI-PAD or similar technology, which is an extension of current
inductive technology that, by design, allows a portion of the head to have
intermittent contact with the disk, will be an important technology for the next
several years. MR-head technology segregates the read and write function to
different elements of the head. By physically disconnecting the writing and
readback processes each can be individually tuned for optimized performance. The
Company expects that the superior performance offered by MR technology will make
it the dominant head technology of the future. In order to take advantage of the
technological potential of these new head technologies and enable the Company to
play a role in setting design specifications for the disk drive product, HMT
works directly with head manufacturers to develop compatible disks. The Company
has demonstrated the ability to produce disks for the new head formats through
the use of non-precious metal alloys, modified equipment and optimized
processes.
 
     The Company believes that its materials science expertise and ongoing
commitment to developing new technologies is critical to remaining competitive
and achieving desired operating results. The Company expects its research and
development effort to remain focused on alloy and process development, substrate
finish and texture, overcoat development, and compatibility with advanced
recording concepts. As it has done in the past, the Company intends to conduct
many of its development programs directly on active production lines,
facilitating transition to high volume commercial production and minimizing
development expense. During the fiscal years 1995, 1996 and 1997 and the three
months ended June 30, 1997, the Company incurred $3.1 million, $3.8 million,
$5.8 million and $1.9 million, respectively, of research and development
expenses. The Company believes that its future success depends on its ability to
continue to enhance its existing products and to develop new products.
 
CUSTOMERS, SALES AND SUPPORT
 
     The Company sells its products directly to independent OEM disk drive
manufacturers for incorporation primarily into hard disk drives which are
marketed under the manufacturers' own labels. The following table sets forth the
percentage of net sales attributable to sales to the Company's principal
customers in fiscal 1995, fiscal 1996, fiscal 1997 and the three months ended
June 30, 1997:
 
<TABLE>
<CAPTION>
                                                    FISCAL
                                            ----------------------     THREE MONTHS ENDED
                                            1995     1996     1997       JUNE 30, 1997
                                            ----     ----     ----     ------------------
        <S>                                 <C>      <C>      <C>      <C>
        Maxtor............................  73.7%    40.5%    40.7%            9.7%
        Samsung...........................   0.3      0.1     19.8            27.7
        Iomega............................    --      2.4     12.2            32.1
        Western Digital...................   5.9     35.8     11.9            18.7
        Micropolis........................  11.2      9.1      8.4             1.6
</TABLE>
 
                                       31
<PAGE>   75
 
     The Company's other customers during fiscal 1997 included Quantum and
Hewlett-Packard. Iomega utilizes the Company's disks in its removable media hard
disk drives. Due to cessation of its high-end manufacturing operations,
Quantum's high-end products are now being manufactured by Matsushita Kotobuki
Electronics Industries ("MKE"), and the Company is currently shipping products
to MKE. Due to the rapid and frequent development of new disk drive products, it
is common in the industry for the relative mix of customers and products to
change rapidly, even from quarter to quarter.
 
     The Company has generally sold its products to customers pursuant to
purchase orders and similar short-term arrangements. In June 1996, the Company
entered into a long-term supply agreement with Maxtor covering the supply of
disks to Maxtor through June 2001. While this agreement contemplates a
significant increase in the purchases of disks by Maxtor from current levels, it
is subject to a number of conditions and qualifications; and there can be no
assurance that Maxtor will in fact remain a significant customer during the term
of the agreement.
 
     The Company believes that close technical collaboration with its customers
and their other suppliers during the design phase of new disk drives facilitates
integration of the Company's products into new disk drives, improves the
Company's ability to rapidly reach cost effective high volume manufacturing and
enhances the likelihood that the Company will become a primary supplier of thin
film disks for new disk drive products. However, the design-in process is
ongoing and recurs frequently, and the Company must compete for participation in
each new product program, even those of existing customers.
 
     The Company's customer sales and service efforts are an integral part of
maintaining strong customer relations. The sales and service organization
processes requests from customers concerning product needs and acts to mobilize
the Company's resources to fulfill customer requests.
 
     Although the Company has broadened its customer base, there are a
relatively small number of disk drive manufacturers, and the Company expects
that its dependence on a few customers will continue in the future.
Additionally, there is the possibility that one or more of the Company's
customers could develop or expand their ability to produce thin film disks
internally and, as a result, could reduce the level of purchases or cease
purchasing from the Company or could sell thin film disks in competition with
the Company. There has also been a trend toward consolidation in the disk drive
industry that the Company expects to continue. If any of the Company's customers
or competitors were to combine and rationalize suppliers and competitive product
lines, the Company's business, results of operations and financial condition
could be materially adversely affected.
 
BACKLOG
 
     The Company's sales are generally made pursuant to purchase orders that are
subject to cancellation, modification, quantity reductions or rescheduling
without significant penalties. Customers typically provide the Company with
forecasts of expected requirements for the next three to six months and submit
purchase orders 60 to 90 days in advance of shipment dates. Because these
purchase orders may be modified or rescheduled by customers on short notice and
without penalty, the Company does not believe that its backlog as of any
particular date should be considered indicative of sales for any future period.
 
COMPETITION
 
     Competitors in the thin film disk industry fall into three groups: U.S.
non-captive manufacturers, Japan-based manufacturers and U.S. captive
manufacturers. Historically each of these groups has supplied approximately
one-third of the worldwide thin film disk unit output. The Company's primary
U.S. non-captive competitors are Akashic, Komag and StorMedia. Japan-based
competitors include Fuji, Mitsubishi, Showa Denko and Hoya. Certain of these
companies have significantly greater financial, technical and marketing
resources than the Company. In addition, U.S. captive manufacturers, which
include certain computer manufacturers, as well as disk drive manufacturers such
as Seagate, an affiliate of Maxtor and Western Digital, manufacture disks or
plan to manufacture disks for their internal use as part of their vertical
integration programs. These companies could increase their internal production
and
 
                                       32
<PAGE>   76
 
reduce or cease purchasing from independent disk suppliers such as the Company.
In the event of an oversupply of disks, these customers are likely to utilize
their internal capacity prior to purchasing disks from independent manufacturers
such as the Company. Moreover, while captive manufacturers have, to date, sold
only nominal quantities of thin film disks in the open market, there can be no
assurance that such companies will not in the future do so in direct competition
with the Company. Furthermore, there can be no assurance that other current and
potential customers will not acquire or develop capacity to produce thin film
disks for internal use, or that disk manufacturing capacity will not exceed
demand. Any such changes could have a material adverse effect on the Company's
business, operating results and financial condition. Announcement or
implementation of any of the following by the Company's competitors could have a
material adverse effect on the Company's business, operating results and
financial condition: changes in pricing, product introductions, increases in
production capacity, changes in product mix and technological innovation.
 
     The market for thin film disk products is highly competitive, and the
Company expects competition to increase in the future. The Company believes that
the principal competitive factors affecting this market include performance,
quality, delivery capability and price. The Company believes that its products
compete favorably in the high-end segment of the market that it serves,
especially with respect to performance and quality. The thin film disk industry
is characterized by short product life cycles, ranging from nine to twelve
months. As a result, the Company must continually anticipate, and adapt its
products to meet, demand for increased storage capacity. There can be no
assurance that in the future the Company will be able to manufacture products on
a timely basis with the quality and features necessary in order to remain
competitive. In addition, the development of technologically innovative products
requires substantial investments in research and development.
 
     The thin film disk industry is characterized by intense price competition.
While the Company believes that consumers in the high-end, high-capacity segment
of the market in which the Company operates are less sensitive to price, the
Company has experienced pricing pressures in the past, and there can be no
assurance that the Company will not experience increased price competition in
the future. Pricing pressure has included, and may in the future include,
demands for discounts, long-term supply commitments and extended payment terms.
Any increase in price competition could have a material adverse effect on the
Company's business, operating results and financial condition. The Company and
certain of its competitors are currently engaged in substantial efforts to
increase disk manufacturing capacity. To the extent that these efforts result in
industry capacity in excess of levels of demand, the Company could experience
increased levels of competition, which could have a material adverse effect on
the Company's business, operating results and financial condition.
 
EMPLOYEES
 
     As of June 30, 1997, the Company had 1,624 full-time employees, with 1,430
in manufacturing, 57 in research and development, 70 in quality assurance and 67
in administration and marketing. The Company believes it generally has good
relations with its employees. None of the Company's employees are represented by
a labor union, and the Company has never experienced a work stoppage.
 
                                       33
<PAGE>   77
 
                                    GLOSSARY
 
AREAL DENSITY: The number of bits of data stored per unit of area.
 
BIT: The basic unit of storage of information in a computer system. Bits are
represented by the presence or absence of changes in orientation of the magnetic
domains along a track on the storage media.
 
BYTE: Equal to eight bits.
 
CHAMFER: The process of cutting the sharp edges from the inner and outer edges
of an aluminum blank.
 
COERCIVITY: A measure of the magnetic strength of the disk which is expressed in
Oersteds.
 
DISK SPUTTERING LINES: A sputtering system and related equipment such as
plating, polishing, texturizing, lubrication and test equipment as well as
related handling equipment.
 
GIGABYTE (GB): Equal to one billion bytes or one thousand megabytes.
 
GLIDE HEIGHT: The height at which the head can fly over the disk without hitting
anything. The glide height is dependent on the smoothness and flatness of the
disk.
 
HEAD OR DISK DRIVE HEAD: Small magnetic transducer that flies above the surface
of the disk and performs the functions of reading and writing data on the disk.
 
INDUCTIVE WRITING AND READING HEADS: Refers to heads which use a single element
for both the writing and reading process. In the writing process, a current
induces an alternating magnetic field at the magnetic tips of the head. In the
reading process, the same element senses the magnetic field from the written
bits of data and thereby induces an electrical current.
 
MAGNETO-RESISTIVE (MR) HEADS: Recording heads that use an inductive thin film
element to write data on to the media and read the data with a separate
magneto-resistive element. The use of a separate but much more sensitive read
element permits data to be recorded and, subsequently, read at much higher track
densities than inductive thin film head technology.
 
MEGABYTE (MB): Equal to one million bytes.
 
MICROINCH: One millionth of an inch.
 
MICRON: One millionth of a meter.
 
NETWORK SERVER OR SERVER: A computer generally configured for the support of
concurrent multi-user applications. The server is generally a storage repository
of software and data.
 
OERSTED (OE): A unit of magnetic strength.
 
PROXIMITY RECORDING: Extension of traditional inductive writing/reading
technology which improves performance by bringing transducer into direct contact
with disk.
 
SPUTTERING: A complex vacuum deposition process used to deposit multiple thin
film layers on a disk.
 
STICTION: The static friction that occurs when two smooth surfaces come into
contact. A common example is a coin on a wet counter.
 
SUBSTRATES: The disk material (typically aluminum) onto which the thin layers of
material are sputtered.
 
THIN FILMS: For magnetic disks, films with thickness measured in microinches
(millionths of an inch).
 
THIN FILM DISK OR DISK: A disk incorporating a thin magnetic film capable of
storing information in the form of magnetic patterns written and detected by a
separate magnetic head within a disk drive.
 
TRIBOLOGY: Refers to the mechanical interaction between the recording head and
the disk.
 
YIELD: A measure of manufacturing efficiency; the percent of acceptable product
obtained from a specific manufacturing process(es).
 
                                       34
<PAGE>   78
 
                              SELLING STOCKHOLDERS
 
     The following table sets forth certain information regarding the beneficial
ownership of the Company's Common Stock as of June 30, 1997 by the Selling
Stockholders. The shares being offered by each Selling Stockholder shall be
allocated 85% to the U.S. Offering and 15% to the International Offering
(subject to rounding adjustments). The Underwriters' over-allotment options
shall be allocated among the Company and the Selling Stockholders based on their
pro rata portion of the shares to be sold in the Offerings. Percentage of
beneficial ownership is based on 41,228,793 shares of Common Stock outstanding
as of June 30, 1997 and the number of shares owned as of such date.
 
<TABLE>
<CAPTION>
                                       SHARES BENEFICIALLY                    SHARES BENEFICIALLY
                                       OWNED PRIOR TO THE                       OWNED AFTER THE
                                          OFFERINGS(1)           SHARES         OFFERINGS(1)(2)
                                      ---------------------      BEING       ---------------------
                                        NUMBER      PERCENT    OFFERED(3)      NUMBER      PERCENT
                                      ----------    -------    ----------    ----------    -------
<S>                                   <C>           <C>        <C>           <C>           <C>
SELLING STOCKHOLDERS
Summit Ventures III, L.P.(4).........  6,778,429      16.4%     2,440,359     4,338,070      10.5%
Summit Ventures IV, L.P.(4)..........  6,778,429      16.4      2,440,359     4,338,070      10.5
Hitachi Metals, Ltd..................  5,146,744      12.5      1,648,489     3,498,255       8.3
Ronald L. Schauer(5).................  3,146,000       7.6      1,100,000     2,046,000       4.8
Summit Subordinated Debt Fund,
  L.P.(4)............................    909,881       2.2        327,518       582,363       1.4
Michael A. Russak(6).................    840,754       2.0        275,000       565,754       1.3
George J. Hall(7)....................    681,215       1.7        240,000       441,215       1.0
Ronald J. Buschur(8).................    889,986       2.2        235,000       654,986       1.6
Peter S. Norris(9)...................    560,769       1.4        100,000       460,769       1.1
Summit Investors II, L.P.(4).........    253,952         *         91,515       162,437         *
Crossroads SF Limited Partnership....    140,573         *         30,003       110,570         *
Crossroads Capital II Limited
  Partnership........................    106,890         *         28,535        78,355         *
Joseph E. Haefele(10)................    200,374         *         20,000       180,374         *
Bruce C. Edwards(11).................     46,500         *         12,000        34,500         *
Crossroads DPT Limited Partnership...     52,537         *         11,222        41,315         *
</TABLE>
 
- ---------------
 
  *  Represents beneficial ownership of less than 1%.
 
 (1) Beneficial ownership is determined in accordance with the rules of the
     Securities and Exchange Commission and generally includes voting or
     investment power with respect to securities. Except as indicated by
     footnote, and subject to community property laws where applicable, the
     persons named in the table above have sole voting and investment power with
     respect to all shares of Common Stock shown as beneficially owned by them.
 
 (2) Adjusted to reflect the sale of 1,000,000 shares by the Company in the
     Offerings.
 
 (3) Assumes no exercise of the Underwriters' over-allotment options. None of
     the shares being offered are subject to a repurchase right in favor of the
     Company.
 
 (4) Walter G. Kortschak, a director of the Company, is a general partner of the
     following entities: (i) Stamps, Woodsum & Co. III, the general partner of
     Summit Partners III, L.P. and Summit Partners SD, L.P., which are the
     general partners of Summit Ventures III, L.P. and Summit Subordinated Debt
     Fund, L.P., respectively; (ii) Stamps, Woodsum & Co. IV, the general
     partner of Summit Partners IV, L.P., which is the general partner of Summit
     Ventures IV, L.P.; and (iii) Summit Investors II, L.P.
 
 (5) Consists of 3,146,000 shares held by Ronald L. Schauer and Marlys A.
     Schauer, as co-trustees of the Schauer Living Trust u/a/d 3/11/96 ("Schauer
     Living Trust"). All of the shares being offered hereby are held by the
     Schauer Living Trust. Includes 1,079,736 shares that are subject to a right
     of repurchase in favor of the Company that expires ratably through November
     1999 and 188,360 shares that are subject to a right of repurchase in favor
     of the Company that expires upon the earlier of the Company achieving
     certain performance goals or ratably beginning December 2000 through
     December 2004. Mr. Schauer is President, Chief Executive Officer and
     Chairman of the Board of the Company.
 
                                       35
<PAGE>   79
 
 (6) Includes 818,899 shares held by Michael A. Russak and Bonnie-Anne Russak,
     as co-trustees of the Russak Living Trust u/a/d 5/31/96 ("Russak Living
     Trust"). All of the shares being offered hereby are held by the Russak
     Living Trust. Includes 21,000 shares held by the Mary Lynn Russak 1996
     Irrevocable Trust ("Mary Lynn Russak Trust") and 635 shares held by Dr.
     Russak's spouse. Mary Lynn Russak, the beneficiary of the Mary Lynn Russak
     Trust, is a daughter of Dr. Russak. Dr. Russak disclaims beneficial
     ownership of the shares held in the Mary Lynn Russak Trust. Includes
     297,794 shares that are subject to a right of repurchase in favor of the
     Company that expires ratably through November 1999 and 51,949 shares that
     are subject to a right of repurchase that expires upon the earlier of the
     Company achieving certain performance goals or ratably beginning December
     2000 through December 2004. Dr. Russak is Vice President, Research and
     Development of the Company.
 
 (7) Consists of 653,715 shares held by George J. Hall and Dianna Lynn Hall, as
     co-trustees of the George J. Hall Family Trust u/a/d 11/26/92, amended
     5/8/96 ("Hall Family Trust") and 27,500 shares held by the Anne T. Hall
     Foundation ("Hall Foundation"). All of the shares being offered hereby are
     held by the Hall Family Trust. Mr. Hall disclaims beneficial ownership of
     the shares held by him as trustee of the Hall Foundation. Includes 297,794
     shares that are subject to a right of repurchase in favor of the Company
     that expires ratably through November 1999 and 51,949 shares that are
     subject to a right of repurchase that expires upon the earlier of the
     Company achieving certain performance goals or ratably beginning December
     2000 through December 2004. Mr. Hall is Vice President, Operations of the
     Company.
 
 (8) Includes 851,546 shares held by Ronald J. Buschur and Lisa A. Buschur, as
     co-trustees of the Buschur Living Trust u/a/d 3/11/96 ("Buschur Living
     Trust"), 19,220 shares held by the Ryan Buschur 1996 Irrevocable Trust
     u/a/d 2/9/96 ("Ryan Buschur Trust") and 19,220 shares held by the Lynsey
     Buschur 1996 Irrevocable Trust u/a/d 2/6/96 ("Lynsey Buschur Trust").
     Subsequent to June 30, 1997, Mr. Buschur transferred 215,760 shares of the
     Company's Common Stock to the Buschur Living Trust. All of the shares being
     offered hereby are held by the Buschur Living Trust. Ryan Buschur, the
     beneficiary of the Ryan Buschur Trust, and Lynsey Buschur, the beneficiary
     of the Lynsey Buschur Trust, are the children of Mr. Buschur. Mr. Buschur
     disclaims beneficial ownership of the shares held by him as trustee of the
     Ryan Buschur Trust and the Lynsey Buschur Trust. Includes 297,794 shares
     that are subject to a right of repurchase in favor of the Company that
     expires ratably through November 1999 and 51,949 shares that are subject to
     a right of repurchase in favor of the Company that expires upon the earlier
     of the Company achieving certain performance goals or ratably beginning
     December 2000 through December 2004. Mr. Buschur is Vice President, Quality
     Assurance of the Company.
 
 (9) Includes 240,857 shares that are subject to a right of repurchase in favor
     of the Company that expires ratably through November 1999 and 29,214 shares
     that are subject to a right of repurchase in favor of the Company that
     expires upon the earlier of the Company achieving certain performance goals
     or ratably beginning December 2000 through December 2004. Mr. Norris is
     Vice President, Finance, Chief Financial Officer, Treasurer and Assistant
     Secretary of the Company.
 
(10) Includes 55,813 shares that are subject to a right of repurchase in favor
     of the Company that expires ratably through November 1999 and 9,718 shares
     that are subject to a right of repurchase in favor of the Company that
     expires upon the earlier of the Company achieving certain performance goals
     or ratably beginning December 2000 through December 2004. Includes 19,740
     shares held by Mr. Haefele's spouse. Mr. Haefele was promoted to Vice
     President of Operations, Fremont of the Company in July 1997.
 
(11) Includes 13,563 shares held by Bruce C. Edwards and Susan E. Edwards, as
     co-trustees of the Bruce C. Edwards and Susan E. Edwards Living Trust u/a/d
     6/26/91 ("Edwards Living Trust"). Subsequent to June 30, 1997, Mr. Edwards
     transferred 2,906 shares of the Company's Common Stock to the Edwards
     Living Trust. All of the shares being offered hereby are held by the
     Edwards Living Trust. Includes 30,031 shares that are subject to a right of
     repurchase in favor of the Company that expires ratably beginning January
     1997 through January 2000. Mr. Edwards is a director of the Company.
 
                                       36
<PAGE>   80
 
                          DESCRIPTION OF CAPITAL STOCK
 
     The authorized capital stock of the Company consists of 100,000,000 shares
of Common Stock, $0.001 par value, and 9,100,000 shares of Preferred Stock,
$0.001 par value.
 
COMMON STOCK
 
     As of August 13, 1997, there were 41,334,565 shares of Common Stock
outstanding held of record by approximately 226 stockholders. The holders of
Common Stock are entitled to one vote per share on all matters to be voted on by
the stockholders. Subject to preferences that may be applicable to outstanding
shares of Preferred Stock, if any, the holders of Common Stock are entitled to
receive ratably such dividends as may be declared from time to time by the Board
of Directors out of funds legally available therefor. In the event of the
liquidation, dissolution or winding up of the Company, the holders of Common
Stock are entitled to share ratably in all assets remaining after payment of
liabilities, subject to prior liquidation rights of Preferred Stock, if any,
then outstanding. The Common Stock has no preemptive rights or other
subscription rights. There are no redemption or sinking funds provisions
applicable to the Common Stock. All outstanding shares of Common Stock are fully
paid and non-assessable.
 
WARRANTS
 
     In connection with the Leveraged Recapitalization, pursuant to a warrant
purchase agreement dated November 30, 1995, the Company issued to certain senior
lenders (the "Warrantholders") warrants to purchase an aggregate of 701,344
shares of Common Stock at a price of $0.0003 per share. The warrants terminate
on November 30, 2002. Upon any reorganization or reclassification, consolidation
or merger or any sale or other transfer of substantially all of its assets the
warrants may be repurchased by the Company with the consent of the
Warrantholders. In the event the Warrantholders do not consent to such
repurchase, the warrants must be exercised prior to the consummation of such
transaction and will be converted into the right to receive a comparable number
of securities or property of the surviving corporation. The warrants include a
net exercise provision, and the Warrantholders have the right to cause the
Company to repurchase the warrants and any shares issued upon exercise thereof
under certain circumstances. Upon payment of the outstanding balance of the
senior bank term loan in March 1996, the Company redeemed warrants for 280,550
shares of Common Stock at the Warrantholders' cost ($0.02), leaving a balance of
420,794 shares subject to the remaining warrants. In addition, the
Warrantholders have certain registration rights with respect to the shares of
Common Stock issuable upon exercise of such warrants. In June 1997, one of the
Warrantholders exercised its warrant and sold all of the underlying shares of
Common Stock. As of June 30, 1997, a warrant to purchase an aggregate of 210,397
shares of Common Stock remained outstanding.
 
REGISTRATION RIGHTS
 
     Pursuant to an agreement between the Company and the holders (or their
permitted transferees) of approximately 29,656,057 shares of Common Stock
("Holders"), the Holders are entitled to certain rights with respect to the
registration of such shares under the Securities Act of 1933, as amended (the
"Securities Act"). If the Company proposes to register its Common Stock, subject
to certain exceptions, under the Securities Act, the Holders are entitled to
notice of the registration and are entitled to include, at the Company's
expense, such shares therein, provided that the managing underwriters have the
right to limit the number of such shares included in the registration. In
addition, certain of the Holders may require the Company at its expense on no
more than two occasions within six months to file a registration statement under
the Securities Act with respect to their shares of Common Stock. Such rights
became exercisable in September 1996. Further, certain Holders may require the
Company at its expense to register their shares on Form S-3 when such form
becomes available to the Company, subject to certain conditions and limitations.
Such right expires in March 2001.
 
     In connection with the issuance of the Convertible Notes, pursuant to the
Registration Agreement for the benefit the holders of the Convertible Notes and
the Common Stock issuable upon conversion
 
                                       37
<PAGE>   81
 
thereof, the Company registered the resale of such securities pursuant to a
shelf registration statement. The other registration rights described above do
not give any other holders of securities of the Company (other than the
Warrantholders) the right to participate in any such registration statement
because such registration rights are inapplicable by their terms or, to the
extent otherwise applicable, have been waived.
 
DELAWARE ANTI-TAKEOVER LAW AND CERTAIN CHARTER PROVISIONS
 
     The Company is governed by the provisions of Section 203 of the Delaware
Law. In general, Section 203 prohibits a public Delaware corporation from
engaging in a "business combination" with an "interested stockholder" for a
period of three years after the date of the transaction in which the person
became an interested stockholder, unless the business combination is approved in
a prescribed manner. A "business combination" includes mergers, asset sales and
other transactions resulting in a financial benefit to the stockholder. An
"interested stockholder" is a person who, together with affiliates and
associates, owns (or within three years, did own) 15% or more of a corporation's
voting stock. The statute could have the effect of delaying, deferring or
preventing a change in control of the Company.
 
     The Company's Certificate of Incorporation and Bylaws also require that any
action required or permitted to be taken by stockholders of the Company must be
effected at a duly called annual or special meeting of the stockholders and may
not be effected by a consent in writing. In addition, special meetings of the
stockholders of the Company may be called only by the Board of Directors, the
Chairman of the Board, the Chief Executive Officer of the Company or by any
person or persons holding shares representing at least 20% of the outstanding
capital stock. The Company's Certificate of Incorporation also specifies that
the authorized number of directors may be changed only by resolution of the
Board of Directors. These provisions may have the effect of deterring hostile
takeovers or delaying changes in control or management of the Company.
 
TRANSFER AGENT AND REGISTRAR
 
     The transfer agent and registrar for the Company's Common Stock is Boston
EquiServe Limited Partnership. Its telephone number is (617) 575-2000.
 
                                       38
<PAGE>   82
 
                                  UNDERWRITING
 
     Subject to the terms and conditions set forth in an underwriting agreement
(the "International Underwriting Agreement") among the Company, the Selling
Stockholders and each of the underwriters named below (the "International
Underwriters"), for whom Salomon Brothers International Limited, Alex. Brown &
Sons International, Hambrecht & Quist LLC and Robertson, Stephens & Company LLC,
are acting as representatives (the "International Representatives"), the Company
and the Selling Stockholders have agreed to sell to each of the International
Underwriters and each of the International Underwriters has severally agreed to
purchase from the Company and the Selling Stockholders the aggregate number of
Shares set forth opposite its name in the table below (the "International
Securities").
 
<TABLE>
<CAPTION>
                                                                              NUMBER OF
                           INTERNATIONAL UNDERWRITERS                           SHARES
    ------------------------------------------------------------------------  ----------
    <S>                                                                       <C>
    Salomon Brothers International Limited..................................     375,000
    Alex. Brown & Sons International........................................     375,000
    Hambrecht & Quist LLC...................................................     375,000
    Robertson, Stephens & Company LLC.......................................     375,000
                                                                              ----------
              Total.........................................................   1,500,000
                                                                              ==========
</TABLE>
 
     The International Underwriting Agreement provides that the obligations of
the International Underwriters to purchase the Shares listed above are subject
to certain conditions set forth therein. The International Underwriters are
committed to purchase all of the Shares offered by this Prospectus (other than
those covered by the over-allotment options described below), if any are
purchased. In the event of default by any International Underwriter, the
International Underwriting Agreement provides that, in certain circumstances,
the purchase commitments of the non-defaulting International Underwriters may be
increased or the International Underwriting Agreement may be terminated.
 
     The International Representatives have advised the Company and the Selling
Stockholders that the International Underwriters propose initially to offer such
Shares to the public at the initial public offering price set forth on the cover
page of this Prospectus, and to certain dealers at such price less a discount
not in excess of $0.36 per share. The International Underwriters may allow, and
such dealers may reallow, a discount not in excess of $0.01 per share on sales
to certain other dealers. After the Offerings, the public offering price and
such discounts may be changed.
 
     The Company and the Selling Stockholders also have entered into an
underwriting agreement (the "U.S. Underwriting Agreement") with the U.S.
Underwriters named therein, for whom Salomon Brothers Inc, Alex. Brown & Sons
Incorporated, Hambrecht & Quist LLC and Robertson, Stephens & Company LLC, are
acting as representatives (the "U.S. Representatives"), providing for the
concurrent offer and sale of 9,775,000 of the Shares in the U.S. and Canada
(including up to 1,275,000 shares subject to exercise of an underwriters'
over-allotment option by the U.S. Underwriters).
 
     The closing with respect to the sale of the Shares pursuant to the
International Underwriting Agreement is a condition to the closing with respect
to the sale of the Shares pursuant to the U.S. Underwriting Agreement, and the
closing with respect to the sale of Shares pursuant to the U.S. Underwriting
Agreement is a condition to the closing with respect to the sale of the Shares
pursuant to the International Underwriting Agreement. The initial public
offering price and underwriting discounts per Share for the International
Offering and the U.S. Offering will be identical.
 
     Each U.S. Underwriter has severally agreed that, as part of the
distribution of the 8,500,000 Shares by the U.S. Underwriters, (i) it is not
purchasing any Shares for the account of anyone other than a
 
                                       39
<PAGE>   83
 
United States or Canadian Person, (ii) it has not offered or sold, and will not
offer or sell, directly or indirectly, any Shares or distribute any Prospectus
relating to the U.S. Offering to any person outside of the United States or
Canada, or to anyone other than a United States or Canadian Person and (iii) any
dealer to whom it may sell any Shares will represent that it is not purchasing
for the account of anyone other than a United States or Canadian Person and
agree that it will not offer or resell, directly or indirectly, any Shares
outside of the United States or Canada, or to anyone other than a United States
or Canadian Person or to any other dealer who does not so represent and agree.
 
     Each International Underwriter has severally agreed that, as part of the
distribution of the 1,500,000 Shares by the International Underwriters, (i) it
is not purchasing any Shares for the account of any United States or Canadian
Person, (ii) it has not offered or sold, and will not offer or sell, directly or
indirectly, any Shares or distribute this Prospectus to any person in the United
States or Canada, or to any United States or Canadian Person and (iii) any
dealer to whom it may sell any Shares will represent that it is not purchasing
for the account of any United States or Canadian Person and agree that it will
not offer or resell, directly or indirectly, any Shares in the United States or
Canada, or to any United States or Canadian Person or to any other dealer who
does not so represent and agree.
 
     The foregoing limitations do not apply to stabilization transactions or to
certain other transactions specified in the Agreement Between U.S. Underwriters
and International Underwriters. "United States or Canadian Person" means any
person who is a national or resident of the United States or Canada, any
corporation, partnership or other entity created or organized in or under the
laws of the United States or Canada or of any political subdivision thereof, and
any estate or trust the income of which is subject to United States or Canadian
federal income taxation, regardless of its source (other than a foreign branch
of such entity) and includes any United States or Canadian branch of a person
other than a United States or Canadian Person.
 
     Each U.S. Underwriter that will offer or sell shares of Common Stock in
Canada as part of the distribution has severally agreed that such offers and
sales will be made only pursuant to an exemption from the prospectus
requirements in each jurisdiction in Canada in which such offers and sales are
made.
 
     Pursuant to the Agreement Between U.S. Underwriters and International
Underwriters, sales may be made between the International Underwriters and the
U.S. Underwriters of such number of Shares as may be mutually agreed. The price
of any Shares so sold shall be the public offering price set forth on the cover
page of this Prospectus, less an amount not greater than the concession to
securities dealers set forth above. To the extent that there are sales between
the International Underwriters and the U.S. Underwriters pursuant to the
Agreement Between U.S. Underwriters and International Underwriters, the number
of Shares initially available for sale by the International Underwriters or by
the U.S. Underwriters may be more or less than the amount specified on the cover
page of this Prospectus.
 
     Each International Underwriter has severally represented and agreed that
(i) it has not offered or sold and, prior to the expiration of six months from
the closing of the International Offering, will not offer or sell any
International Securities in the United Kingdom other than to persons whose
ordinary activities involve them in acquiring, holding, managing or disposing of
investments (whether as principal or agent) for the purposes of their businesses
or otherwise in circumstances which have not resulted in and will not result in
an offer to the public within the meaning of the Public Offers of Securities
Regulations 1995; (ii) it has complied and will comply with all applicable
provisions of the Financial Services Act of 1986 with respect to anything done
by it in relation to the International Securities in, from or otherwise
involving the United Kingdom; and (iii) it has only issued or passed on and will
only issue or pass on in the United Kingdom any document received by it in
connection with the issue of the International Securities to a person who is of
a kind described in Article 11(3) of the Financial Services Act 1986 (Investment
Advertisements) (Exemptions) Order 1996 or is a person to whom such document may
otherwise lawfully be issued or passed on.
 
     The Company and the Selling Stockholders have granted to the International
Underwriters and the U.S. Underwriters options to purchase up to an additional
225,000 and 1,275,000 Shares, respectively, at the price to public less the
underwriting discount set forth on the cover page of this Prospectus, solely to
cover over-allotments, if any. Such options may be exercised at any time up to
30 days after the date
 
                                       40
<PAGE>   84
 
of this Prospectus. To the extent such options are exercised, each of the
International Underwriters and the U.S. Underwriters will become obligated,
subject to certain conditions, to purchase approximately the same percentage of
such additional shares of Common Stock as the percentage it was obligated to
purchase pursuant to the International Underwriting Agreement or the U.S.
Underwriting Agreement, as applicable.
 
     The Company, the Selling Stockholders and all of the executive officers and
directors of the Company have agreed not to offer, sell, contract to sell,
pledge or otherwise dispose of, or file a registration statement with the
Commission in respect of, or establish or increase a put equivalent position or
liquidate or decrease a call equivalent position within the meaning of Section
16 of the Exchange Act with respect to, any shares of capital stock of the
Company or any securities convertible into or exercisable or exchangeable for
such capital stock, or publicly announce an intention to effect any such
transaction (except for the shares offered hereby) for a period of 90 days after
the date of this Prospectus without the prior written consent of Salomon
Brothers Inc, subject to certain limited exceptions. Salomon Brothers Inc
currently does not intend to release any securities subject to such lock-up
agreements, but may, in its sole discretion and at any time without notice,
release all or any portion of the securities subject to such lock-up agreements.
 
     The International Underwriting Agreement and the U.S. Underwriting
Agreement provide that the Company and the Selling Stockholders will indemnify
the several International Underwriters and U.S. Underwriters against certain
liabilities under the Securities Act, or contribute to payments the
International Underwriters and the U.S. Underwriters may be required to make in
respect thereof.
 
     Certain of the Underwriters and their affiliates have been engaged from
time to time, and may in the future be engaged, to perform investment banking
and other advisory-related services to the Company and its affiliates, including
certain of the Selling Stockholders, in the ordinary course of business. In
connection with rendering such services in the past, such Underwriters and
affiliates have received customary compensation, including reimbursement of
related expenses.
 
     In connection with the offering, the Underwriters may engage in
transactions that stabilize, maintain or otherwise affect the price of the
Common Stock. Specifically, the Underwriters may overallot the offering,
creating a syndicate short position. In addition, the Underwriters may bid for
and purchase shares of Common Stock in the open market to cover syndicate short
positions or to stabilize the price of the Common Stock. Finally, the
underwriting syndicate may reclaim selling concessions from syndicate members in
the offering, if the syndicate repurchases previously distributed Common Stock
in syndicate covering transactions, in stabilization transactions or otherwise.
Any of these activities may stabilize or maintain the market price of the Common
Stock above independent market levels. The Underwriters are not required to
engage in these activities, and may end any of these activities at any time.
 
                                 LEGAL MATTERS
 
     The validity of the shares of Common Stock offered hereby will be passed
upon for the Company and the Selling Stockholders by Cooley Godward LLP, Palo
Alto, California. Certain legal matters in connection with this offering will be
passed upon for the Underwriters by Wilson Sonsini Goodrich & Rosati,
Professional Corporation, Palo Alto, California. As of the date of this
Prospectus, Cooley Godward LLP beneficially owns 93,000 shares of Common Stock,
of which 60,062 shares are subject to the Company's right of repurchase. In
addition, James C. Kitch, a partner of Cooley Godward LLP, is the Secretary of
the Company.
 
                                       41
<PAGE>   85
 
                                    EXPERTS
 
     The consolidated financial statements and financial statement schedule of
the Company included in the Company's Annual Report on Form 10-K for the fiscal
year ended March 31, 1997, incorporated by reference in this Prospectus, have
been audited by Coopers & Lybrand L.L.P., independent accountants, as set forth
in their report dated April 22, 1997, and are incorporated by reference herein
in reliance upon the report of such firm, which report is given upon their
authority as experts in accounting and auditing.
 
                             ADDITIONAL INFORMATION
 
     The Company is subject to the informational requirements of the Exchange
Act, and, in accordance therewith, files reports, proxy statements and other
information with the Commission. Such reports, proxy statements and other
information can be inspected and copied at the public reference facilities
maintained by the Commission at Room 1024, 450 Fifth Street, N.W., Washington,
D.C. 20549, and at the Commission's Regional Offices located at Seven World
Trade Center, 13th Floor, New York, New York 10048 and at Citicorp Center, 500
West Madison Street, Suite 1400, Chicago, Illinois 60661. The Commission
maintains a Web site that contains reports, proxy and information statements and
other information regarding registrants that file electronically with the
Commission. The address of such Web site is http://www.sec.gov. The Company's
Common Stock is listed on the Nasdaq National Market, 1735 K Street, N.W.,
Washington, D.C. 20006, and reports, proxy statements and other information
concerning the Company can be inspected at said office.
 
     A registration statement on Form S-3 with respect to the Common Stock
offered hereby (together with all amendments and exhibits, the "Registration
Statement") has been filed with the Commission under the Act. This Prospectus
does not contain all of the information contained in such Registration Statement
and the exhibits and schedules thereto, certain portions of which have been
omitted pursuant to the rules and regulations of the Commission. For further
information with respect to the Company and the Common Stock offered hereby,
reference is made to the Registration Statement and the exhibits and schedules
thereto. Statements contained in this Prospectus regarding the contents of any
contract or any other documents are not necessarily complete and, in each
instance, reference is hereby made to the copy of such contract or document
filed as an exhibit to the Registration Statement. The Registration Statement,
including exhibits thereto, may be inspected without charge at the Securities
and Exchange Commission's principal office in Washington, D.C., and copies of
all or any part thereof may be obtained from the Public Reference Section,
Securities and Exchange Commission, Washington, D.C. 20549, upon payment of the
prescribed fees.
 
                                       42
<PAGE>   86
 
NO DEALER, SALESPERSON OR OTHER PERSON HAS BEEN AUTHORIZED TO GIVE ANY
INFORMATION OR TO MAKE ANY REPRESENTATIONS OTHER THAN THOSE CONTAINED IN THIS
PROSPECTUS IN CONNECTION WITH THE OFFER MADE BY THIS PROSPECTUS AND, IF GIVEN OR
MADE, SUCH INFORMATION OR REPRESENTATIONS MUST NOT BE RELIED UPON AS HAVING BEEN
AUTHORIZED BY THE COMPANY, THE SELLING STOCKHOLDERS OR ANY OF THE UNDERWRITERS.
NEITHER THE DELIVERY OF THIS PROSPECTUS NOR ANY SALE MADE HEREUNDER SHALL, UNDER
ANY CIRCUMSTANCES, CREATE ANY IMPLICATION THAT THERE HAS BEEN NO CHANGE IN THE
AFFAIRS OF THE COMPANY SINCE THE DATE AS OF WHICH INFORMATION IS GIVEN IN THIS
PROSPECTUS. THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER OR SOLICITATION BY
ANYONE IN ANY JURISDICTION IN WHICH SUCH OFFER OR SOLICITATION IS NOT AUTHORIZED
OR IN WHICH THE PERSON MAKING SUCH OFFER OR SOLICITATION IS NOT QUALIFIED TO DO
SO OR TO ANY PERSON TO WHOM IT IS UNLAWFUL TO MAKE SUCH SOLICITATION.
 
                             ---------------------
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                       PAGE
                                       ----
<S>                                    <C>
Incorporation of Certain Documents by
  Reference..........................    2
Prospectus Summary...................    3
Risk Factors.........................    6
Use of Proceeds......................   14
Dividend Policy......................   14
Price Range of Common Stock..........   14
Capitalization.......................   15
Selected Consolidated Financial
  Data...............................   16
Management's Discussion and Analysis
  of Financial Condition and Results
  of Operations......................   17
Business.............................   23
Glossary.............................   34
Selling Stockholders.................   35
Description of Capital Stock.........   37
Underwriting.........................   39
Legal Matters........................   41
Experts..............................   42
Additional Information...............   42
</TABLE>
 
10,000,000 SHARES
HMT TECHNOLOGY
CORPORATION
COMMON STOCK
($.001 PAR VALUE)
LOGO
SALOMON BROTHERS
INTERNATIONAL LIMITED
 
ALEX. BROWN & SONS
        INTERNATIONAL
 
HAMBRECHT & QUIST
ROBERTSON, STEPHENS & COMPANY
PROSPECTUS
 
DATED AUGUST 13, 1997


© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission